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 A157234 #2 Mar 30 2012 16:51:16 %S A157234 1,-5,-171,2815,163305,-4560125,-389093571,15247993735,1730774795985, %T A157234 -87230967310325,-12373627121809371,762240242336496655, %U A157234 129743913678787540665,-9445699930131209919725,-1875748758904668008579571,157568683906141461793511575,35760388081788065845786749345 %N A157234 Numerator of Euler(n, 9/28). %Y A157234 For denominators see A009972. %K A157234 sign,frac %O A157234 0,2 %A A157234 _N. J. A. Sloane_, Nov 07 2009