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 A128255 #8 Jan 31 2025 19:39:17
%S A128255 1,1,1,2,3,1,2,6,5,1,3,10,13,7,1,3,15,27,23,9,1,4,21,48,57,36,1,4,28,
%T A128255 78,118,104,52,13,1,5,36,118,218,246,172,71,15,1,5,45,170,370,510,458,
%U A128255 265,93,17,1
%N A128255 A114219(signed) * A007318.
%C A128255 Row sums = A059570: (1, 2, 6, 14, 34, 78, 178,...).
%F A128255 Let the signed version of A114219 {1; 0,1; 0,1,1; 0,-1,2,1; 0,1,-2,-3,4;...} = M; and P = Pascal's triangle, A007318. Then A128255 = A114219(signed) * A007318.
%e A128255 First few rows of the triangle are:
%e A128255 1;
%e A128255 1, 1;
%e A128255 2, 3, 1;
%e A128255 2, 6, 5, 1;
%e A128255 3, 10, 13, 7, 1;
%e A128255 3, 15, 27, 23, 9, 1;
%e A128255 4, 21, 48, 57, 36, 11, 1;
%e A128255 ...
%Y A128255 Cf. A103450, A114219, A007318, A059570, A097807, A128229.
%K A128255 nonn,tabl
%O A128255 1,4
%A A128255 _Gary W. Adamson_, Feb 20 2007