%I #12 Jul 01 2018 16:27:08
%S 0,0,2,12,60,340,2310,18354,165592,1664424,18410130,222085270,
%T 2901011124,40790592492,614247917374,9862468172970,168192316357680,
%U 3036117383306704,57835808554908042,1159445925005561694,24400842327684259660,537878773763482265940
%N a(n) = binomial(n,2) * !n.
%D See A003422 for !n.
%H Harry J. Smith, <a href="/A061834/b061834.txt">Table of n, a(n) for n = 0..200</a>
%H <a href="/index/Fi#final">Index entries for sequences related to final digits of numbers</a>
%o (PARI) { f=1; L=0; for (n=0, 200, if (n, L+=f; f*=n); write("b061834.txt", n, " ", L*binomial(n, 2)) ) } \\ _Harry J. Smith_, Jul 28 2009
%Y Cf. A003422.
%K nonn
%O 0,3
%A _N. J. A. Sloane_, Nov 10 2001