%I #5 Jan 08 2019 14:12:10
%S 1,6,960,40037760
%N Number of Hamiltonian cycle decompositions of the complete graph on 2n+1 vertices.
%H Douglas S. Stones, <a href="http://mathoverflow.net/questions/10577/hamilton-cycle-decompositions-of-the-complete-graph">Hamiltonian cycle decompositions of the complete graph</a>. MathOverflow.
%K bref,hard,more,nonn
%O 1,2
%A _Max Alekseyev_, Jun 28 2010
%E a(1)-a(4) were computed by Douglas S. Stones.