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 A128256 #8 Jan 27 2025 02:30:45 %S A128256 1,-1,1,2,0,1,-2,2,1,1,3,0,3,2,1,-3,3,3,5,3,1,4,0,6,8,8,4,1,-4,4,6,14, %T A128256 16,12,5,1,5,0,10,20,30,28,17,6,1,-5,5,10,30,50,58,45,23,7,1 %N A128256 A004736(signed) * A007318. %F A128256 A004736(with alternate signs: (1; -2,1; 3,-2,1;...)) * A007318, Pascal's triangle. %e A128256 First few rows of the triangle are: %e A128256 1; %e A128256 -1, 1; %e A128256 2, 0, 1; %e A128256 -2, 2, 1, 1; %e A128256 3, 0, 3, 2, 1; %e A128256 -3, 3, 3, 5, 3, 1; %e A128256 4, 0, 6, 8, 8, 4, 1; %e A128256 -4, 4, 6, 14, 16, 12, 5, 1; %e A128256 5, 0, 10, 10, 30, 28, 17, 6, 1; %e A128256 ... %Y A128256 Cf. A004736, A007318, A053088 (row sums). %K A128256 tabl,sign %O A128256 1,4 %A A128256 _Gary W. Adamson_, Feb 21 2007