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 A156897 #6 Jul 31 2014 04:34:02 %S A156897 1,-19,-42,11647,23982,-6194779,-38133522,55733008199,114327763662, %T A156897 -53764922346349,-551437385813202,633976248876074077, %U A156897 3901396856082694542,-2650470665560547274919,-38058072327453466328082,238664680344984987892563943,489568969024047882430124622 %N A156897 Numerator of Euler(n, 2/23). %H A156897 Vincenzo Librandi, <a href="/A156897/b156897.txt">Table of n, a(n) for n = 0..200</a> %t A156897 Numerator[EulerE[Range[0, 20], 2/23]] (* _Vincenzo Librandi_, Jul 31 2014 *) %Y A156897 For denominators see A156892. %K A156897 sign,frac %O A156897 0,2 %A A156897 _N. J. A. Sloane_, Nov 07 2009