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 A049722 #4 Mar 30 2012 18:56:56 %S A049722 11,13,15,20,26,33,43,54,67,83,98,117,135,154,179,203,228,255,281,314, %T A049722 343,378,414,447,488,526,567,608,652,703,748,797,845,898,953,1007, %U A049722 1064,1123,1183,1246,1305,1372,1438,1505,1576,1642 %N A049722 a(n)=T(n,3), array T as in A048149. %K A049722 nonn %O A049722 0,1 %A A049722 _Clark Kimberling_