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 A134397 #6 Mar 25 2022 00:34:15 %S A134397 1,2,1,4,4,1,8,12,6,1,15,30,23,8,1,26,65,68,37,10,1,42,126,168,126,54, %T A134397 12,1,64,224,364,350,208,74,14,1,93,372,714,840,642,318,97,16,1,130, %U A134397 585,1296,1806,1692,1080,460,123,18,1 %N A134397 A077018 * A007318. %C A134397 Row sums = A048481: (1, 3, 9, 27, 77, 207, 529, ...). %F A134397 A077018 * A007318 as infinite lower triangular matrices. %e A134397 First few rows of the triangle: %e A134397 1; %e A134397 2, 1; %e A134397 4, 4, 1; %e A134397 8, 12, 6, 1; %e A134397 15, 30, 23, 8, 1; %e A134397 26, 65, 68, 37, 10, 1; %e A134397 42, 126, 168, 126, 54, 12, 1; %e A134397 ... %Y A134397 Cf. A077018, A048481. %K A134397 nonn,tabl %O A134397 0,2 %A A134397 _Gary W. Adamson_, Oct 23 2007