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 A179195 #5 Mar 31 2012 14:41:48 %S A179195 1,0,1,1,2,1,0,0,0,1,1,1,2,4,1,0,2,0,4,2,1,1,0,1,2,1,3,1,0,1,0,0,1,6, %T A179195 0,1,1,2,2,1,2,3,2,6,1,0,0,0,4,0,6,0,0,4,1,1,1,1,4,1,2,2,3,4,10,1,0,1, %U A179195 0,1,1,0,0,6,2,5,2,1,1,0,2,0,1,1,2,0,1,5,2,12,1,0,1,0,1,1,3,0,3,1,5,1,3,3,1 %N A179195 Triangle array: row n lists the number of repeating digits of 1/2 through 1/(n-1) in base n, or 0 if it terminates. %e A179195 Rows show the number of repeating digits for: %e A179195 1/2 base 3 %e A179195 1/2 base 4, 1/3 base 4 %e A179195 1/2 base 5, 1/3 base 5, 1/4 base 5 %Y A179195 Cf. A066799 (similar table but does not differentiate terminating versus non-terminating values.) %K A179195 nonn,tabl,base %O A179195 3,5 %A A179195 _Will Nicholes_, Jul 01 2010