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 A090159 #7 Jul 31 2021 14:27:56 %S A090159 25,121,721,5041,40321,3628801,6227020801,87178291201, %T A090159 121645100408832001,2432902008176640001,620448401733239439360001, %U A090159 15511210043330985984000001,403291461126605635584000001,304888344611713860501504000001,295232799039604140847618609643520000001 %N A090159 Semiprimes of the form m! + 1. %F A090159 a(n) = A078778(n)! + 1. %Y A090159 Cf. A038507, A078778, A082952, A090160. %K A090159 nonn %O A090159 1,1 %A A090159 _Ray Chandler_, Nov 22 2003 %E A090159 Offset changed to 1 and more terms from _Jinyuan Wang_, Jul 31 2021