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 A134577 #8 Mar 26 2022 14:30:14 %S A134577 1,2,2,2,0,3,3,4,0,4,2,0,0,0,5,4,4,6,0,0,6,2,0,0,0,0,0,7,4,6,0,8,0,0, %T A134577 0,8,3,0,6,0,0,0,0,0,9,4,4,0,0,10,0,0,0,0,10 %N A134577 A127170 * A127648. %C A134577 Row sums = A007429: (1, 4, 5, 11, 7, 20, 9, 26, ...). %C A134577 Left border = A000005: (1, 2, 2, 3, 2, 4, 2, ...). %C A134577 A134577 * [1/1, 1/2, 1/3, ...] = A007425: (1, 3, 3, 6, 3, 9, 3, 10, ...). %C A134577 A134577 * [1, 2, 3, ...] = A007433: (1, 6, 11, 27, 27, 66, ...). %C A134577 A134577 * A000005 = A034761: (1, 6, 8, 23, 12, 48, ...). %F A134577 A127170 * A127648 = A051731^2 * A127648 = A051731 * A127093. %e A134577 First few rows of the triangle: %e A134577 1; %e A134577 2, 2; %e A134577 2, 0, 3; %e A134577 3, 4, 0, 4; %e A134577 2, 0, 0, 0, 5 %e A134577 4, 4, 6, 0, 0, 6; %e A134577 2, 0, 0, 0, 0, 0, 7; %e A134577 4, 6, 0, 8, 0, 0, 0, 8; %e A134577 ... %Y A134577 Cf. A051731, A127170, A127648, A127093, A007429, A127170, A007433, A034761. %K A134577 nonn,tabl,more %O A134577 1,2 %A A134577 _Gary W. Adamson_, Nov 02 2007