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%I #3 Jan 21 2014 12:30:22
%S 1,3,31,1684,271776,97484904,65617109160,74248657560720,
%T 130752443907524880,338450307621257099520,1232284889962378714855680,
%U 6094200542431309662145478400,39788645361978802435089535468800,334957784448996146804912925763507200
%N a(0) = 1; thereafter a(n) = A144422(n)/n.
%Y Cf. A144422, A001515, A105749, A144905.
%K nonn
%O 0,2
%A _David Applegate_ and _N. J. A. Sloane_, Feb 16 2009
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