OFFSET
1,1
LINKS
Zlatko Damijanic, Table of n, a(n) for n = 1..160
Eric Weisstein's World of Mathematics, Complete Tripartite Graph.
Eric Weisstein's World of Mathematics, Hamiltonian Cycle.
FORMULA
a(n) = 2*A307924(n). - Andrew Howroyd, Nov 10 2024
MATHEMATICA
Table[n!^2 (n - 1)! 2^n HypergeometricPFQ[{n, (1 - n)/2, -n/2}, {1, 1}, 1], {n, 10}] (* Eric W. Weisstein, Apr 26, 2017 *)
CROSSREFS
KEYWORD
nonn,changed
AUTHOR
Max Alekseyev, Dec 25 2013
STATUS
approved