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 A169826 #4 Jun 02 2025 02:13:04 %S A169826 1,2,5,8,16,27,45,69,109,171,268,404,597,860,1215 %N A169826 Row sums of triangle A178568. %F A169826 a(n) = sum of n-th row terms of triangle A178568 %e A169826 a(6) = 27 = (1 + 5 + 5 + 9 + 5 + 2) %Y A169826 Cf. A178568 %K A169826 nonn %O A169826 1,2 %A A169826 _Gary W. Adamson_, May 29 2010