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A307935 Number of (undirected) Hamiltonian paths in the n-cocktail party graph. 0
0, 4, 120, 6912, 631680, 84211200, 15432560640, 3722677862400, 1143584003358720, 435902085306777600, 201889940373209088000, 111673403387053395148800, 72713691524377589317632000, 55052849030095232395798118400, 47957058157063329359371173888000 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..15.

Eric Weisstein's World of Mathematics, Cocktail Party Graph

Eric Weisstein's World of Mathematics, Hamiltonian Path

FORMULA

a(n) = A007060(n)/2.

CROSSREFS

Cf. A007060.

Sequence in context: A002702 A068204 A203033 * A001332 A071304 A213957

Adjacent sequences:  A307932 A307933 A307934 * A307936 A307937 A307938

KEYWORD

nonn,easy

AUTHOR

Eric W. Weisstein, May 06 2019

STATUS

approved

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Last modified August 5 19:30 EDT 2020. Contains 336213 sequences. (Running on oeis4.)