A029871 Number of connected functions on n points with a loop of length 8.

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

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