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 A132128 #4 Mar 05 2022 00:55:55 %S A132128 1,2,4,4,5,8,7,8,9,13,11,12,13,14,19,16,17,18,19,20,26,22,23,24,25,26, %T A132128 27,34,29,30,31,32,33,34,35,43,37,38,39,40,41,42,43,44,53 %N A132128 A051340 + A000027 - A000012. %C A132128 Row sums = A132127: (1, 6, 17, 37, 69, 116, 181, ...). %F A132128 A051340 + A000027 - A000012 as infinite lower triangular matrices. %e A132128 First few rows of the triangle: %e A132128 1; %e A132128 2, 4; %e A132128 4, 5, 8; %e A132128 7, 8, 9, 13; %e A132128 11, 12, 13, 14, 19; %e A132128 16, 17, 18, 19, 20, 26; %e A132128 ... %Y A132128 Cf. A051340, A000027, A000012, A132127. %K A132128 nonn,tabl %O A132128 1,2 %A A132128 _Gary W. Adamson_, Aug 10 2007