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 A049734 #4 Mar 30 2012 18:56:56 %S A049734 18,22,26,35,46,60,79,100,125,156,185,222,257,294,343,390,439,492,543, %T A049734 608,665,734,805,870,951,1026,1107,1188,1275,1376,1465,1562,1657,1762, %U A049734 1871,1978,2091,2208,2327,2452,2569,2702,2833 %N A049734 a(n)=T(n,3), array T as in A049723. %K A049734 nonn %O A049734 0,1 %A A049734 _Clark Kimberling_