This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A162994 #9 Apr 01 2024 13:52:56 %S A162994 64,1600,57600,2822400,180633600,14631321600,1463132160000, %T A162994 177038991360000,25493614755840000,4308420893736960000, %U A162994 844450495172444160000,190001361413799936000000,48640348521932783616000000,14057060722838574465024000000 %N A162994 The third left hand column of triangle A162990. %F A162994 a(n) = ((n+1)!/3)^2 for n = 3, 4, 5, ... . %F A162994 a(n) = A002301(n+1)^2. %t A162994 Array[((#+1)!/3)^2 &, 20, 3] (* _Paolo Xausa_, Apr 01 2024 *) %Y A162994 A001044 and A162993 are two other left hand columns. %Y A162994 A002301(n+1) equals the square root of a(n). %K A162994 easy,nonn %O A162994 3,1 %A A162994 _Johannes W. Meijer_, Jul 21 2009