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A071605(n)/(n-1)!.
2

%I #7 Feb 21 2013 15:16:49

%S 1,3,9,36,285,1908,21630,197328,2113911,23814810,294557142,3893052636,

%T 55457566905

%N A071605(n)/(n-1)!.

%Y Cf. A071605, A040175.

%K nonn,more,hard

%O 1,2

%A _N. J. A. Sloane_, Feb 08 2008

%E a(10)-a(13) from _Stephen A. Silver_, Feb 21 2013