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 A003985 #9 Mar 30 2012 17:38:09 %S A003985 1,0,0,1,2,1,0,2,2,0,1,0,3,0,1,0,0,0,0,0,0,1,2,1,4,1,2,1,0,2,2,4,4,2, %T A003985 2,0,1,0,3,4,5,4,3,0,1,0,0,0,4,4,4,4,0,0,0,1,2,1,0,5,6,5,0,1,2,1,0,2, %U A003985 2,0,0,6,6,0,0,2,2,0,1,0,3,0,1,0,7,0,1,0,3,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0 %N A003985 Triangle with subscripts (1,1),(2,1),(1,2),(3,1),(2,2),(1,3), etc. in which entry (i,j) is i AND j. %Y A003985 Antidiagonal sums are in A006581. %K A003985 tabl,nonn,easy %O A003985 1,5 %A A003985 _Marc LeBrun_ %E A003985 More terms from Larry Reeves (larryr(AT)acm.org), Sep 21 2000