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 A128313 #8 Jun 05 2023 07:03:25 %S A128313 1,-2,1,0,-2,1,0,2,-3,1,0,-4,6,-4,1,0,6,-11,10,-5,1,0,-6,15,-20,15,-6, %T A128313 1,0,4,-18,34,-35,21,-7,1,0,-6,27,-56,70,-56,28,-8,1,0,12,-42,88,-127, %U A128313 126,-84,36,-9,1,0,-10,45,-120,210,-252,210,-120,45,-10,1,0,4,-42,154,-325,461,-462,330,-165,55,-11,1 %N A128313 Moebius transform of A007318 (signed). %C A128313 Row sums = mu(n), A008683: (1, -1, -1, 0, -1, 1, ...). %F A128313 A054525 * A130595. %e A128313 First few rows of the triangle: %e A128313 1; %e A128313 -2, 1; %e A128313 0, -2, 1; %e A128313 0, 2, -3, 1; %e A128313 0, -4, 6, -4, 1; %e A128313 0, 6, -11, 10, -5, 1; %e A128313 ... %Y A128313 Cf. A007318, A008683, A054525, A130595. %K A128313 tabl,sign %O A128313 1,2 %A A128313 _Gary W. Adamson_, Feb 25 2007 %E A128313 a(45) = 1 inserted and more terms from _Georg Fischer_, Jun 05 2023