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A029871 Number of connected functions on n points with a loop of length 8. 2
1, 1, 6, 25, 104, 384, 1380, 4729, 15806, 51478, 164788, 519296, 1617066, 4983855, 15233671, 46235252, 139506803, 418838281, 1252174861, 3730058316, 11077154790, 32808815240, 96953599162, 285945645659, 841909040785, 2475184643011, 7267678432397, 21315839832323 (list; graph; refs; listen; history; text; internal format)
OFFSET

8,3

LINKS

Andrew Howroyd, Table of n, a(n) for n = 8..500

C. G. Bower, Transforms

FORMULA

"CIK[ 8 ]" (necklace, indistinct, unlabeled, 8 parts) transform of A000081.

a(n) ~ A187770 * A051491^n / n^(3/2). - Vaclav Kotesovec, Dec 25 2020

CROSSREFS

Column 8 of A339428.

Sequence in context: A037481 A199844 A267536 * A188178 A147543 A212258

Adjacent sequences:  A029868 A029869 A029870 * A029872 A029873 A029874

KEYWORD

nonn

AUTHOR

Christian G. Bower

EXTENSIONS

Terms a(32) and beyond from Andrew Howroyd, Dec 04 2020

STATUS

approved

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Last modified July 28 19:33 EDT 2021. Contains 346335 sequences. (Running on oeis4.)