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 A157812 #8 Feb 18 2019 09:57:59 %S A157812 1,9,20,351,380,3249,6860,229167,118460,971919,1981100,32152941, %T A157812 32499740,262096389,527337740,33900692319,8503972220,68206642659, %U A157812 136664636780,2189507427531,2192051783900,17555075136729,35121618358220,1123425366518277,562385127902780 %N A157812 Numerator of Euler(n,5). %C A157812 a(35) is the first negative term. %H A157812 Georg Fischer, <a href="/A157812/b157812.txt">Table of n, a(n) for n = 0..100</a> %t A157812 Numerator[EulerE[Range[0,30],5]] (* _Harvey P. Dale_, Apr 17 2015 *) %Y A157812 For denominators see A006519. %K A157812 sign,frac %O A157812 0,2 %A A157812 _N. J. A. Sloane_, Nov 10 2009