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 A132307 #5 Mar 05 2022 00:54:41 %S A132307 1,3,1,7,7,1,15,23,11,1,31,63,47,15,1,63,159,159,79,19,1,127,383,479, %T A132307 319,119,23,1,255,895,1343,1119,559,167,27,1,511,2047,3583,3583,2239, %U A132307 895,223,31,1,1023,4607,9215,10751,8063,4031,1343,287,35,1 %N A132307 2*A007318^(2) - A000012. %C A132307 Row sums = A132308: (1, 4, 15, 50, 157, 480, 1451, ...). Inverse binomial transform of A132307 = triangle A132309 (having row sums A077552). %F A132307 2*A007318^(2) - A000012 as infinite lower triangular matrices. %e A132307 First few rows of the triangle: %e A132307 1; %e A132307 3, 1; %e A132307 7, 7, 1; %e A132307 15, 23, 11, 1; %e A132307 31, 63, 47, 15, 1; %e A132307 63, 159, 159, 79, 19, 1; %e A132307 ... %Y A132307 Cf. A132308, A132309, A077552. %K A132307 nonn,tabl %O A132307 0,2 %A A132307 _Gary W. Adamson_, Aug 18 2007