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 A203775 #13 Nov 17 2016 11:17:25 %S A203775 1,20,1170,136000,26276900,7605187200,3079172005000,1661435709440000, %T A203775 1152219238256970000,998612074565747200000,1057635292751424744500000, %U A203775 1344007509419503558656000000,2018255243962112126438545000000 %N A203775 Square root of v(2*n+1) / (2*v(2*n)), where v=A203773. %C A203775 See A203773. %F A203775 a(n) = n*gamma((1-i)*n)*gamma((1+i)*n)*sinh(n*Pi)/Pi (conjecture). - _Velin Yanev_, Nov 14 2016 %t A203775 (See A203773.) %K A203775 nonn %O A203775 1,2 %A A203775 _Clark Kimberling_, Jan 05 2012