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 A127479 #7 Feb 14 2022 21:27:00 %S A127479 1,2,0,3,2,0,4,0,2,0,5,4,4,4,0,6,2,0,0,2,0,7,6,6,6,6,6,0,8,0,6,0,4,0, %T A127479 4,0,9,8,0,6,6,0,6,6,0,10,4,8,4,0,0,4,0,4,0 %N A127479 Triangle read by rows: A054522 * A054521 as infinite lower triangular matrices. %C A127479 Row sums = A029939: (1, 2, 5, 6, 17, 10, 37, ...). %e A127479 First few rows of the triangle: %e A127479 1; %e A127479 2, 0; %e A127479 3, 2, 0; %e A127479 4, 0, 2, 0; %e A127479 5, 4, 4, 4, 0; %e A127479 6, 2, 0, 0, 2, 0; %e A127479 7, 6, 6, 6, 6, 6, 0; %e A127479 8, 0, 6, 0, 4, 0, 4, 0; %e A127479 ... %Y A127479 Cf. A029939, A054522, A054521. %K A127479 nonn,tabl,more %O A127479 1,2 %A A127479 _Gary W. Adamson_, Jan 15 2007 %E A127479 Edited by _N. J. A. Sloane_, Aug 10 2019