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 A049738 #8 Aug 06 2021 23:42:34
%S A049738 1,5,26,50,123,183,364,448,753,925,1414,1618,2271,2599,3536,3940,5133,
%T A049738 5645,7178,7822,9747,10443,12780,13656,16325,17413,20638,21870,25531,
%U A049738 26955,31272,32808,37633,39521,44970,46914,53055
%N A049738 a(n) = Sum_{i=0..floor(n/2)} T(2i,n-2i), array T as in A049735.
%K A049738 nonn
%O A049738 0,2
%A A049738 _Clark Kimberling_