A348821 a(n) = number of chord labeled loopless diagrams by number of K_6.

0, 1, 5812, 276154969, 39738077935264, 14571371516350429940, 11876790400066163254723167, 19372051918038657958659363247949, 58256941603805590330534264712744407687, 302616041649108508974263266688425815263488561, 2575195630881373033515248134269171034879932771154311

Offset

1,3

Links

Andrew Howroyd, Table of n, a(n) for n = 1..100

Evgeniy Krasko, Igor Labutin, and Alexander Omelchenko, Enumeration of Labelled and Unlabelled Hamiltonian Cycles in Complete k-partite Graphs, arXiv:1709.03218 [math.CO], 2017. See Appendix Table 5.

Crossrefs

Row 6 of A369923.

Cf. A190835, A348822, A348823; A003436, A348813, A348815, A348818.

Sequence in context: A206655 A270866 A251920 * A104284 A237477 A131494

Adjacent sequences: A348818 A348819 A348820 * A348822 A348823 A348824

Keyword

nonn

Author

Michael De Vlieger, Nov 01 2021

Extensions

a(8) onwards from Andrew Howroyd, Feb 05 2024

Status

approved