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 A208152 #11 Dec 07 2021 20:03:57 %S A208152 1,1,1,3,2,1,6,4,1,1,24,16,4,3,1,48,32,8,6,1,1,144,96,24,18,3,2,1,188, %T A208152 192,48,36,6,4,1,1,1440,960,240,180,30,20,5,4,1,2880,1920,480,360,60, %U A208152 10,8,1,1,8640,5760,1440,1080,180,120,30,24,3,2,1 %N A208152 Triangle by rows, generated from the Ruler sequence A001511. %C A208152 Row sums = A208147: (1, 2, 6, 12, 48, 96, 288, ...). %F A208152 Inverse of: %F A208152 1; %F A208152 -1, 1; %F A208152 -1, -2, 1; %F A208152 -1, -2, -1, 1; %F A208152 -1, -2, -1, -3, 1; %F A208152 -1, -2, -1, -3, -1, 1; %F A208152 -1, -2, -1, -3, -1, -2, 1; %F A208152 ..., where the signed terms are negatives of A001511 terms: (1, 2, 1, 3, 1, 2, 1, 4, ...). %e A208152 First few rows of the triangle = %e A208152 1; %e A208152 1, 1; %e A208152 3, 2, 1; %e A208152 6, 4, 1, 1; %e A208152 24, 16, 4, 3, 1; %e A208152 48, 32, 8, 6, 1, 1; %e A208152 144, 96, 24, 18, 3, 2, 1; %e A208152 288, 192, 48, 36, 6, 4, 1, 1; %e A208152 1440, 960, 240, 180, 30, 20, 5, 4, 1; %e A208152 2880, 1920, 480, 360, 60, 40, 10, 8, 1, 1; %e A208152 8640, 5760, 1440, 1080, 180, 120, 30, 24, 3, 2, 1; %e A208152 ... %Y A208152 Cf. A001511, A208147. %K A208152 nonn,tabl %O A208152 1,4 %A A208152 _Gary W. Adamson_, Feb 23 2012