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 A069135 #13 Jan 15 2023 09:51:31
%S A069135 1,4,144,20736,8294400,7464960000,13168189440000,41295442083840000,
%T A069135 214075571762626560000,1734012131277275136000000,
%U A069135 20981546788455029145600000000,365582471242040427832934400000000,8896815020146295851742291558400000000,294698100727325903793111665580441600000000
%N A069135 a(n) = (n!*(n+1)!)^2.
%F A069135 a(n) = det(PS(i+2,j), 1 <= i,j <= n), where PS(n,k) are Legendre-Stirling numbers of the second kind (A071951) [_Mircea Merca_, Apr 04 2013]
%F A069135 a(n) = A010790(n)^2. - _Michel Marcus_, Jan 15 2023
%t A069135 Table[(n!(n + 1)!)^2, {n, 1, 10}]
%o A069135 (PARI) a(n) = (n!*(n+1)!)^2; \\ _Michel Marcus_, Jan 15 2023
%Y A069135 Cf. A010790, A071951.
%K A069135 nonn
%O A069135 0,2
%A A069135 Rebecca Gladu (rgladu(AT)eve.assumption.edu), Apr 07 2002
%E A069135 Edited and extended by _Robert G. Wilson v_, Apr 08 2002
%E A069135 More terms from _Michel Marcus_, Jan 15 2023