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 A177926 #11 Feb 09 2025 01:09:40 %S A177926 1,4,576,518400,13168189440000,229442532802560000, %T A177926 437763136697395052544000000,40990389067797283140009984000000, %U A177926 1263377636044591724886240423994982400000000,92956902680071188234494975268405495542386262016000000000000 %N A177926 a(n) = ((prime(n) - 1)!)^2. %C A177926 Except first three terms, sqrt(a(n)/400) is an integer, also sqrt(a(n+1)/a(n)) is an integer. - _Giovanni Teofilatto_, May 16 2010 %t A177926 ((Prime[Range[10]]-1)!)^2 (* _Harvey P. Dale_, Apr 13 2014 *) %Y A177926 Cf. A177771. %K A177926 easy,nonn %O A177926 1,2 %A A177926 _Giovanni Teofilatto_, May 15 2010 %E A177926 One more term from _Harvey P. Dale_, Apr 13 2014