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%I #6 Nov 21 2023 19:35:51
%S 1,24,720,28800,1512000,101606400,8534937600,877879296000,
%T 108637562880000,15933509222400000,2734190182563840000,
%U 542861032610856960000,123500884918969958400000,31920228717518389248000000,9302466654819644866560000000,3036325116133132084445184000000
%N a(n) = determinant of the n X n matrix m(i,j) = (i+j+2)!/i!/j!.
%F a(n) = (1/12)*(n+1)*(n+2)!*(n+3)!.
%o (PARI) a(n)=(1/12)*(n+1)*(n+2)!*(n+3)!
%Y Cf. A001286.
%K nonn
%O 0,2
%A _Benoit Cloitre_, Apr 11 2005
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