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%I #20 Sep 08 2022 08:44:45
%S 0,0,2,30,552,14280,517680,25396560,1625662080,131681531520,
%T 13168185811200,1593350882323200,229442532323558400,
%U 38775788037405619200,7600054456464819148800,1710012252722891749632000,437763136697374129754112000
%N 2nd Euler polynomial evaluated at x=n!.
%F a(n) = n!*(n!-1). - _Mark van Hoeij_, May 13 2013
%F a(n) = A000142(n)*(A000142(n-1). - _Michel Marcus_, Apr 15 2015
%t Table[n! (n! - 1), {n, 0, 20}] (* _Vincenzo Librandi_, Apr 15 2015 *)
%o (PARI) vector(20, n, n--; (n!)^2-n!) \\ _Michel Marcus_, Apr 15 2015
%o (Magma) [Factorial(n)*(Factorial(n)-1): n in [0..30]]; // _Vincenzo Librandi_, Apr 15 2015
%Y Cf. A000142 (n!).
%K nonn
%O 0,3
%A _Simon Plouffe_
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