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 A178240 #4 Jun 02 2025 02:58:10 %S A178240 1,2,3,5,7,11,16,23,32,46,64,88,119,156,203 %N A178240 Row sums of triangle A178239. %F A178240 a(n) = sum of r-th row terms of triangle A178239 %e A178240 a(5) = 16 = (1 + 1 + 5 + 1 + 5 + 2 + 1). %Y A178240 Cf. A178239 %K A178240 nonn %O A178240 0,2 %A A178240 _Gary W. Adamson_, May 23 2010