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 A156961 #2 Mar 30 2012 16:51:16 %S A156961 1,-7,-95,2681,63745,-3151687,-111008735,7730428601,362578577665, %T A156961 -32485422829447,-1904310174842975,208548540123990521, %U A156961 14670031692604944385,-1898693409680238225607,-155820577900257936731615,23270028476826775276304441,2182522600557853423794875905 %N A156961 Numerator of Euler(n, 5/24). %Y A156961 For denominators see A009968. %K A156961 sign,frac %O A156961 0,2 %A A156961 _N. J. A. Sloane_, Nov 07 2009