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 A049744 #4 Mar 30 2012 18:56:56 %S A049744 5,9,21,37,57,89,121,161,213,261,325,385,457,545,621,717,805,917,1033, %T A049744 1137,1265,1389,1533,1669,1801,1969,2129,2305,2469,2637,2837,3017, %U A049744 3233,3425,3641,3861,4061,4309,4537,4785,5033,5273 %N A049744 a(n)=T(n,1), array T as in A049735. %K A049744 nonn %O A049744 0,1 %A A049744 _Clark Kimberling_