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 A049746 #4 Mar 30 2012 18:56:56 %S A049746 29,37,45,61,81,109,145,185,233,293,349,421,489,561,657,749,845,949, %T A049746 1049,1177,1289,1425,1565,1693,1853,2001,2161,2321,2493,2693,2869, %U A049746 3061,3249,3457,3673,3885,4109,4341,4577,4825,5057,5321 %N A049746 a(n)=T(n,3), array T as in A049735. %K A049746 nonn %O A049746 0,1 %A A049746 _Clark Kimberling_