A307936 Numbers of (undirected) Hamiltonian paths in the complete tripartite graph K_{n,n,n}.

3, 120, 18792, 7547904, 6210432000, 9116955648000, 21746167511040000, 78775578609057792000, 411821286886186942464000, 2985318922218593845248000000, 29060162328471184917135360000000, 369984034079871408445744742400000000

Offset

1,1

Links

Table of n, a(n) for n=1..12.

Eric Weisstein's World of Mathematics, Complete Tripartite Graph

Eric Weisstein's World of Mathematics, Hamiltonian Path

Formula

a(n) = A234633(n)/2.

Crossrefs

Cf. A234633.

Sequence in context: A185554 A134230 A321109 * A308142 A289704 A246292

Adjacent sequences: A307933 A307934 A307935 * A307937 A307938 A307939

Keyword

nonn

Author

Eric W. Weisstein, May 06 2019

Status

approved