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 A128430 #5 Feb 18 2022 22:17:43 %S A128430 1,0,-1,0,-1,-1,0,-1,0,0,0,-1,-1,-1,-1,0,-1,0,1,1,1,0,-1,-1,-1,-1,-1, %T A128430 -1,0,-1,0,0,0,0,0,0,0,-1,-1,0,0,0,0,0,0,0,-1,0,0,0,1,1,1,1,1 %N A128430 Triangle read by rows: A054524 * A000012. %C A128430 Right border = mu(n), A008683. Row sums = A023900: (1, -1, -2, -1, -4, 2, -6, -1, ...). A054524 = A051731 * A128407. %F A128430 A054524 * A000012 as infinite lower triangular matrices. %e A128430 First few rows of the triangle: %e A128430 1; %e A128430 0, -1; %e A128430 0, -1, -1; %e A128430 0, -1, 0, 0; %e A128430 0, -1, -1, -1, -1; %e A128430 0, -1, 0, 1, 1, 1; %e A128430 0, -1, -1, -1, -1, -1, -1; %e A128430 0, -1, 0, 0, 0, 0, 0, 0; %e A128430 ... %Y A128430 Cf. A054524, A000012, A051731, A128407, A008683, A023900. %K A128430 tabl,sign %O A128430 1,1 %A A128430 _Gary W. Adamson_, Mar 02 2007