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 A134348 #9 Mar 25 2022 00:35:16 %S A134348 1,1,3,-1,2,7,1,-3,3,15,-1,4,-6,4,31,1,-5,10,-10,5,63,-1,6,-15,20,-15, %T A134348 6,127,1,-7,21,-35,35,-21,7,255,-1,8,-28,56,-70,56,-28,8,511,1,-9,36, %U A134348 -84,126,-126,84,-36,9,1023 %N A134348 A007318^(-1) * A134347. %C A134348 Row sums = A046055: (1, 4, 8, 16, 32, 64, ...). %F A134348 Inverse binomial transform of triangle A134347. %e A134348 First few rows of the triangle: %e A134348 1; %e A134348 1, 3; %e A134348 -1, 2, 7; %e A134348 1, -3, 3, 15; %e A134348 -1, 4, -6, 4, 31; %e A134348 1, -5, 10, -10, 5, 63; %e A134348 -1, 6, -15, 20, -15, 6, 127; %e A134348 1, -7, 21, -35, 35, -21, 7, 255; %e A134348 ... %Y A134348 Cf. A007318, A046055, A134347. %K A134348 tabl,sign %O A134348 0,3 %A A134348 _Gary W. Adamson_, Oct 21 2007