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 A156193 #5 May 04 2012 03:13:59 %S A156193 1,-3,-10,207,590,-10443,-87730,8725719,24386030,-779929533, %T A156193 -10896056050,851890629837,7140660673070,-329895072654423, %U A156193 -6452172716731570,2751576311657256183,7688003030273049710,-464469099846794359113,-11679689713099591922290 %N A156193 Numerator of Euler(n, 2/7). %H A156193 Vincenzo Librandi, <a href="/A156193/b156193.txt">Table of n, a(n) for n = 0..200</a> %t A156193 Numerator[EulerE[Range[0,20],2/7]] (* _Vincenzo Librandi_, May 04 2012 *) %Y A156193 For denominators see A156192. %K A156193 sign,frac %O A156193 0,2 %A A156193 _N. J. A. Sloane_, Nov 07 2009