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A029869 Number of connected functions on n points with a loop of length 6. 3
1, 1, 5, 18, 63, 206, 671, 2087, 6434, 19472, 58375, 173316, 511452, 1500697, 4386021, 12775455, 37118209, 107621858, 311552351, 900775893, 2601887149, 7510011727, 21664873773, 62473966631, 180104101037, 519126161517, 1496177366884, 4312044894059, 12427896986697 (list; graph; refs; listen; history; text; internal format)
OFFSET

6,3

LINKS

Andrew Howroyd, Table of n, a(n) for n = 6..500

C. G. Bower, Transforms

FORMULA

"CIK[ 6 ]" (necklace, indistinct, unlabeled, 6 parts) transform of A000081.

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

CROSSREFS

Column 6 of A339428.

Sequence in context: A113301 A111567 A121050 * A033453 A284840 A301749

Adjacent sequences:  A029866 A029867 A029868 * A029870 A029871 A029872

KEYWORD

nonn

AUTHOR

Christian G. Bower

EXTENSIONS

Terms a(31) and beyond from Andrew Howroyd, Dec 08 2020

STATUS

approved

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