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A306447 Number of (undirected) Hamiltonian cycles in the n-antiprism graph. 0
3, 9, 16, 29, 56, 110, 225, 469, 991, 2110, 4511, 9666, 20736, 44511, 95575, 205253, 440828, 946817, 2033628, 4367986, 9381949, 20151433, 43283195, 92967882, 199685571, 428904390, 921243268, 1978737467, 4250128235, 9128846273, 19607840040, 42115660645 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Extended to a(1)-a(2) using the formula/recurrence.

LINKS

Table of n, a(n) for n=1..32.

Eric Weisstein's World of Mathematics, Antiprism Graph

Eric Weisstein's World of Mathematics, Hamiltonian Cycle

FORMULA

a(n) = A124353(n)/2.

CROSSREFS

Sequence in context: A174440 A244475 A212870 * A257034 A232167 A058538

Adjacent sequences:  A306444 A306445 A306446 * A306448 A306449 A306450

KEYWORD

nonn

AUTHOR

Eric W. Weisstein, May 04 2019

STATUS

approved

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Last modified January 28 13:05 EST 2020. Contains 331321 sequences. (Running on oeis4.)