A032208 Number of connected functions on n points with a loop of length 12.

1, 1, 8, 45, 229, 1043, 4474, 18034, 69698, 259516, 938342, 3308793, 11427018, 38763095, 129499981, 426937452, 1391429896, 4489322347, 14356694844, 45554354359, 143546523999, 449545164857, 1400098598183, 4339078154900, 13387747332571, 41141433154653

Offset

12,3

Links

Andrew Howroyd, Table of n, a(n) for n = 12..500

C. G. Bower, Transforms (2)

Formula

"CIK[ 12 ]" (necklace, indistinct, unlabeled, 12 parts) transform of A000081.

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

Crossrefs

Column 12 of A339428.

Sequence in context: A110609 A201190 A297089 * A163003 A368576 A055422

Adjacent sequences: A032205 A032206 A032207 * A032209 A032210 A032211

Keyword

nonn

Author

Christian G. Bower

Extensions

Terms a(35) and beyond from Andrew Howroyd, Dec 04 2020

Status

approved