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 A202817 #7 Mar 30 2012 16:52:08 %S A202817 0,1,1,2,1,0,8,10,11,11,40,32,22,11,0,256,296,328,350,361,361 %N A202817 The right-hand half-triangle of A202691. %e A202817 Triangle begins: %e A202817 0 %e A202817 1 1 %e A202817 2 1 0 %e A202817 8 10 11 11 %e A202817 40 32 22 11 0 %e A202817 256 296 328 350 361 361 %Y A202817 Cf. A202691, A202818. %K A202817 nonn,tabl,more %O A202817 1,4 %A A202817 _N. J. A. Sloane_, Dec 25 2011