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 A129236 #4 Feb 18 2022 22:29:56 %S A129236 1,1,2,2,0,3,2,1,0,4,4,0,0,0,5,2,2,1,0,0,6,6,0,0,0,0,0,7,4,2,0,1,0,0, %T A129236 0,8,6,0,2,0,0,0,0,0,9,4,4,0,0,1,0,0,0,0,10 %N A129236 A054525 * A129234. %C A129236 Left border = phi(n), A000010: (1, 1, 2, 2, 4, 2, 6, ...). A129237 = inverse Moebius transform of A129234. %F A129236 A054525 * A129234 as infinite lower triangular matrices. %e A129236 First few rows of the triangle: %e A129236 1; %e A129236 1, 2; %e A129236 2, 0, 3; %e A129236 2, 1, 0, 4; %e A129236 4, 0, 0, 0, 5; %e A129236 2, 2, 1, 0, 0, 6; %e A129236 6, 0, 0, 0, 0, 0, 7; %e A129236 4, 2, 0, 1, 0, 0, 0, 8; %e A129236 ... %Y A129236 Cf. A129234, A129235, A129237. %K A129236 nonn,tabl %O A129236 1,3 %A A129236 _Gary W. Adamson_, Apr 05 2007