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 A157835 #5 Nov 21 2013 12:49:34 %S A157835 1,13,42,1079,1722,21853,68922,3458143,2696442,33470203,103382202, %T A157835 2543904389,3897783162,47622059953,145048634682,14103257698751, %U A157835 5345548005882,64723086609103,195627183442362,4724479536886499,7123774068628602,85858009003835653,258510157720861242 %N A157835 Numerator of Euler(n,7). %t A157835 Numerator[EulerE[Range[0,25],7]] (* _Harvey P. Dale_, Aug 18 2011 *) %Y A157835 For denominators see A006519. %K A157835 nonn,frac %O A157835 0,2 %A A157835 _N. J. A. Sloane_, Nov 10 2009