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Need a special routine (like &NOSEQ) for “Would someone please extend this sequence?”
more
More terms are needed! Would someone please extend this sequence?
#130
opened Jul 6, 2019 by
AlexDaniel
A000001 / groups
core
A fundamental sequence
hard
Next term is not known and may be hard to find. Would someone please extend this sequence?
nice
An exceptionally nice sequence
nonn
A sequence of nonnegative numbers
#118
opened Jul 6, 2019 by
AlexDaniel
A000014 / series-reduced-trees
core
A fundamental sequence
easy
It is easy to produce terms of this sequence
nice
An exceptionally nice sequence
nonn
A sequence of nonnegative numbers
#117
opened Jul 6, 2019 by
AlexDaniel
A000019 / primitive-permutation-groups
core
A fundamental sequence
nice
An exceptionally nice sequence
nonn
A sequence of nonnegative numbers
#116
opened Jul 6, 2019 by
AlexDaniel
A000041 / partitions
core
A fundamental sequence
easy
It is easy to produce terms of this sequence
nice
An exceptionally nice sequence
nonn
A sequence of nonnegative numbers
#113
opened Jul 6, 2019 by
AlexDaniel
A000055 / trees
core
A fundamental sequence
easy
It is easy to produce terms of this sequence
nice
An exceptionally nice sequence
nonn
A sequence of nonnegative numbers
#111
opened Jul 6, 2019 by
AlexDaniel
A000081 / rooted-trees
core
A fundamental sequence
easy
It is easy to produce terms of this sequence
eigen
An eigensequence: a fixed sequence for some transformation
nice
An exceptionally nice sequence
nonn
A sequence of nonnegative numbers
#110
opened Jul 6, 2019 by
AlexDaniel
A000088 / graphs
core
A fundamental sequence
nice
An exceptionally nice sequence
nonn
A sequence of nonnegative numbers
#109
opened Jul 6, 2019 by
AlexDaniel
A000105 / polyominoes
core
A fundamental sequence
hard
Next term is not known and may be hard to find. Would someone please extend this sequence?
nice
An exceptionally nice sequence
nonn
A sequence of nonnegative numbers
#108
opened Jul 6, 2019 by
AlexDaniel
A000140 / kendall-mann
core
A fundamental sequence
easy
It is easy to produce terms of this sequence
nice
An exceptionally nice sequence
nonn
A sequence of nonnegative numbers
#105
opened Jul 6, 2019 by
AlexDaniel
A000273 / directed-graphs
core
A fundamental sequence
nice
An exceptionally nice sequence
nonn
A sequence of nonnegative numbers
#102
opened Jul 6, 2019 by
AlexDaniel
A000521 / coefficients-j-function
core
A fundamental sequence
easy
It is easy to produce terms of this sequence
nice
An exceptionally nice sequence
nonn
A sequence of nonnegative numbers
#99
opened Jul 6, 2019 by
AlexDaniel
A000602 / hydrocarbons
core
A fundamental sequence
easy
It is easy to produce terms of this sequence
nice
An exceptionally nice sequence
nonn
A sequence of nonnegative numbers
#97
opened Jul 6, 2019 by
AlexDaniel
A000670 / preferential-arrangements
core
A fundamental sequence
easy
It is easy to produce terms of this sequence
nice
An exceptionally nice sequence
nonn
A sequence of nonnegative numbers
#95
opened Jul 6, 2019 by
AlexDaniel
A000798 / quasi-orders
core
A fundamental sequence
hard
Next term is not known and may be hard to find. Would someone please extend this sequence?
nice
An exceptionally nice sequence
nonn
A sequence of nonnegative numbers
#93
opened Jul 6, 2019 by
AlexDaniel
A000959 / lucky
core
A fundamental sequence
easy
It is easy to produce terms of this sequence
nice
An exceptionally nice sequence
nonn
A sequence of nonnegative numbers
#92
opened Jul 6, 2019 by
AlexDaniel
A001034 / simple-groups
core
A fundamental sequence
nice
An exceptionally nice sequence
nonn
A sequence of nonnegative numbers
#90
opened Jul 6, 2019 by
AlexDaniel
A001055 / multiplicative-partition
core
A fundamental sequence
easy
It is easy to produce terms of this sequence
nice
An exceptionally nice sequence
nonn
A sequence of nonnegative numbers
#88
opened Jul 6, 2019 by
AlexDaniel
A001349 / connected-graphs
core
A fundamental sequence
nice
An exceptionally nice sequence
nonn
A sequence of nonnegative numbers
#86
opened Jul 6, 2019 by
AlexDaniel
A001615 / sublattices
core
A fundamental sequence
easy
It is easy to produce terms of this sequence
mult
Multiplicative: a (m n) = a (m) a (n) if gcd (m, n) = 1
nice
An exceptionally nice sequence
nonn
A sequence of nonnegative numbers
#85
opened Jul 6, 2019 by
AlexDaniel
A002033 / perfect-partitions
core
A fundamental sequence
easy
It is easy to produce terms of this sequence
nice
An exceptionally nice sequence
nonn
A sequence of nonnegative numbers
#81
opened Jul 6, 2019 by
AlexDaniel
A002322 / carmichael-lambda
core
A fundamental sequence
easy
It is easy to produce terms of this sequence
nice
An exceptionally nice sequence
nonn
A sequence of nonnegative numbers
#78
opened Jul 6, 2019 by
AlexDaniel
A003484 / hurwitz-radon
core
A fundamental sequence
easy
It is easy to produce terms of this sequence
mult
Multiplicative: a (m n) = a (m) a (n) if gcd (m, n) = 1
nice
An exceptionally nice sequence
nonn
A sequence of nonnegative numbers
#73
opened Jul 6, 2019 by
AlexDaniel
A004018 / square-lattice
core
A fundamental sequence
easy
It is easy to produce terms of this sequence
nice
An exceptionally nice sequence
nonn
A sequence of nonnegative numbers
#71
opened Jul 6, 2019 by
AlexDaniel
A005036 / dissections
core
A fundamental sequence
nice
An exceptionally nice sequence
nonn
A sequence of nonnegative numbers
#70
opened Jul 6, 2019 by
AlexDaniel
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