A162994 - OEIS

%I #9 Apr 01 2024 13:52:56

%S 64,1600,57600,2822400,180633600,14631321600,1463132160000,

%T 177038991360000,25493614755840000,4308420893736960000,

%U 844450495172444160000,190001361413799936000000,48640348521932783616000000,14057060722838574465024000000

%N The third left hand column of triangle A162990.

%F a(n) = ((n+1)!/3)^2 for n = 3, 4, 5, ... .

%F a(n) = A002301(n+1)^2.

%t Array[((#+1)!/3)^2 &, 20, 3] (* _Paolo Xausa_, Apr 01 2024 *)

%Y A001044 and A162993 are two other left hand columns.

%Y A002301(n+1) equals the square root of a(n).

%K easy,nonn

%O 3,1

%A _Johannes W. Meijer_, Jul 21 2009