%I #8 Aug 29 2024 17:40:53
%S 1,1,56,375375,577185873264,337143653615801672640,
%T 112387296492020598351382561996800,
%U 30035919199125011172228882156381540400453089375,8612584407483201348696124216860807740603132996062773468500000000
%N a(n) = (n^2)!/(n!)^(n+1)/(2n-1).
%K nonn,changed
%O 1,3
%A _Benoit Cloitre_, Nov 01 2002
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