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 A048215 #4 Mar 30 2012 18:56:54 %S A048215 7,11,18,23,29,36,43,51,58,66,71,75,83,91,99,104,109,116,124,133,140, %T A048215 148,157,168,176,182,187,194,201,211,219,227,231,236,243,252,259,264, %U A048215 273,283,294,301,308,314,321,327,335,344,354 %N A048215 a(n)=T(n,3), array T given by A048212. %K A048215 nonn %O A048215 3,1 %A A048215 _Clark Kimberling_