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 A118508 #17 Aug 09 2015 15:33:42 %S A118508 0,2,0,0,2,0,1,3,1,0,2,4,2,1,0,0,0,4,3,2,0,2,2,6,5,4,2,0,3,3,7,6,5,3, %T A118508 1,0,0,4,0,7,6,4,2,1,0,2,0,2,0,8,6,4,3,2,0,0,2,4,2,0,8,6,5,4,2,0,1,3, %U A118508 5,3,1,9,7,6,5,3,1,0,2,4,6,4,2 %N A118508 Triangle read by rows: R(n,k) = A002808(n) mod A002808(k), 0<k<=n. %p A118508 A118508 := proc(n,k) A002808(n) mod A002808(k) ; end proc: %p A118508 seq(seq(A118508(n,k),k=1..n),n=1..15) ; # _R. J. Mathar_, Nov 26 2010 %Y A118508 Cf. A002808. %K A118508 nonn,tabl %O A118508 1,2 %A A118508 _Juri-Stepan Gerasimov_, Nov 26 2010