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 A130070 #7 Feb 20 2022 14:35:29 %S A130070 2,1,2,3,0,2,4,1,0,2,9,0,0,0,2,7,3,1,0,0,2,15,0,0,0,0,0,2,12,4,0,1,0, %T A130070 0,0,2,18,0,3,0,0,0,0,0,2,17,9,0,0,1,0,0,0,0,2 %N A130070 Moebius transform of A130069. %C A130070 Row sums = the primes, A000040: (2, 3, 5, 7, ...). Left column = A007444, the Moebius transform of the primes: (2, 1, 3, 4, 9, 7, 15, ...). A130071 = triangle with reversal of nonzero terms. %F A130070 A054525 * A130069. %e A130070 First few rows of the triangle: %e A130070 2; %e A130070 1, 2; %e A130070 3, 0, 2; %e A130070 4, 1, 0, 2; %e A130070 9, 0, 0, 0, 2; %e A130070 7, 3, 1, 0, 0, 2; %e A130070 15, 0, 0, 0, 0, 0, 2; %e A130070 12, 4, 0, 1, 0, 0, 0, 2; %e A130070 18, 0, 3, 0, 0, 0, 0, 0, 2; %e A130070 17, 9, 0, 0, 1, 0, 0, 0, 0, 2; %e A130070 ... %Y A130070 Cf. A054525, A130069, A130071. %K A130070 nonn,tabl %O A130070 1,1 %A A130070 _Gary W. Adamson_, May 05 2007