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a(n) = n! * (n+1)! * (n+2)! * (n+3)! / (2! * 3! * 4!).
2

%I #20 Aug 14 2023 08:27:49

%S 1,120,43200,36288000,60963840000,184354652160000,929147446886400000,

%T 7358847779340288000000,87423111618562621440000000,

%U 1500180595374534583910400000000,36040338623277818843863449600000000

%N a(n) = n! * (n+1)! * (n+2)! * (n+3)! / (2! * 3! * 4!).

%H Seiichi Manyama, <a href="/A010798/b010798.txt">Table of n, a(n) for n = 1..142</a>

%H <a href="/index/Fa#factorial">Index entries for sequences related to factorial numbers</a>

%t #/(2!3!4!)&/@Times@@@Partition[Range[20]!,4,1] (* _Harvey P. Dale_, Jul 29 2022 *)

%Y Column 4 in triangle A009963.

%K nonn,easy

%O 1,2

%A _N. J. A. Sloane_

%E Offset changed to 1 by _Seiichi Manyama_, Aug 14 2023