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 A142157 #4 Mar 30 2012 18:51:59 %S A142157 1,1,3,3,1,1,7,3,3,5,3,7,5,3,3,3,3,1,3,5,1,7,9,1,5,1,7,7,3,7,7,3,9,5, %T A142157 1,3,9,9,1,5,3,5,5,7,1,5,1,5,9,5,3,3,5,1,9,7,9,9,5,5,5,9,1,1,3,3,1,1, %U A142157 7,3,3,5,3,7,5,3,3,3,3,1,3,5,1,7,9,1,5,1,7,7,3,7,7,3,9,5,1,3,9,9,1 %N A142157 Last digit of A003319(n). %F A142157 A003319(n) mod 10. %K A142157 nonn,base,less %O A142157 1,3 %A A142157 _Paul Curtz_, Sep 16 2008 %E A142157 Edited and extended by _R. J. Mathar_, Feb 23 2009