A307924 Number of (undirected) Hamiltonian cycles in the complete tripartite graph K_{n,n,n}.

1, 16, 1584, 463104, 299289600, 361552896000, 732443959296000, 2305449150971904000, 10654390419268829184000, 69202145783548005580800000, 610152377325314475294720000000, 7098963015274747190071787520000000, 106459726394067298796772293345280000000, 2017443502989317777418537171765166080000000

Offset

1,2

Links

Table of n, a(n) for n=1..14.

Eric Weisstein's World of Mathematics, Complete Tripartite Graph

Eric Weisstein's World of Mathematics, Hamiltonian Cycle

Formula

a(n) = A234365(n)/2.

Crossrefs

Cf. A234365.

Sequence in context: A071900 A321247 A145406 * A263387 A264199 A160306

Adjacent sequences: A307921 A307922 A307923 * A307925 A307926 A307927

Keyword

nonn

Author

Eric W. Weisstein, May 06 2019

Status

approved