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%I #3 Mar 31 2012 13:21:56
%S 0,0,0,144,6000,198000,6420960,218453760,7988440320,316674489600,
%T 13630070361600,635880851020800,32050874586931200,1738651147833600000,
%U 101100246720625152000,6277170099060596736000,414620927349422137344000
%N A000407(n)-A086984(n).
%F a(n)=(2*n-1)!/(n-1)!-n!-sum(i=2, n, binomial(n-1, n-i)*n*n!)
%o (PARI) a(n)=(2*n-1)!/(n-1)!-n!-sum(i=2,n,binomial(n-1,n-i)*n*n!) for (i=2,20,print1(a(i)","))
%Y Cf. A000407, A086984.
%K nonn
%O 1,4
%A _Jon Perry_, Jul 27 2003
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