A307902 Number of (undirected) Hamiltonian cycles in the n-Andrásfai graph.

0, 1, 5, 145, 8697, 1109389, 236702901, 81673860457, 41736542812481, 30500162412101749

Offset

1,3

Links

Table of n, a(n) for n=1..10.

Eric Weisstein's World of Mathematics, Andrásfai Graph

Eric Weisstein's World of Mathematics, Hamiltonian Cycle

Formula

a(n) = A143249(n)/2.

Crossrefs

Sequence in context: A273920 A076218 A267989 * A281427 A294360 A346084

Adjacent sequences: A307899 A307900 A307901 * A307903 A307904 A307905

Keyword

nonn,more

Author

Eric W. Weisstein, May 04 2019

Status

approved