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 A049616 #8 Aug 05 2021 19:40:33
%S A049616 0,0,2,6,13,22,36,52,73,98,130,164,207,252,306,368,439,512,598,686,
%T A049616 787,898,1022,1148,1291,1440,1604,1778,1969,2162,2378,2596,2831,3080,
%U A049616 3348,3628,3933,4240,4568,4912,5281,5652,6054,6458,6887,7338,7814,8292,8803
%N A049616 a(n) = Sum_{i=1..n} T(i,n-i), where T is A049615.
%K A049616 nonn
%O A049616 0,3
%A A049616 _Clark Kimberling_
%E A049616 More terms from _Sean A. Irvine_, Aug 05 2021