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 A157875 #2 Mar 30 2012 16:51:18 %S A157875 1,19,90,3401,8010,150499,704970,52691617,61372170,1140755269, %T A157875 5287653450,195603709691,451204910730,8308374039439,38168889398730, %U A157875 5600435030805569,3204210737415690,58567326513265009,267221673587412810,9740358918723188381 %N A157875 Numerator of Euler(n,10). %Y A157875 For denominators see A006519. %K A157875 nonn,frac %O A157875 0,2 %A A157875 _N. J. A. Sloane_, Nov 10 2009