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 A156963 #4 Jan 19 2020 13:10:17 %S A156963 1,-1,-143,431,102817,-516961,-180591983,1271389391,590431841857, %T A156963 -5344434717121,-3101366777446223,34311221287283951, %U A156963 23891962452055766497,-312381736724957870881,-253773444779195937916463,3828493412657940540740111,3554513595972161589740996737 %N A156963 Numerator of Euler(n, 11/24). %t A156963 EulerE[Range[0,20],11/24]//Numerator (* _Harvey P. Dale_, Jan 19 2020 *) %Y A156963 For denominators see A009968. %K A156963 sign,frac %O A156963 0,3 %A A156963 _N. J. A. Sloane_, Nov 07 2009