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 A134380 #6 Mar 25 2022 00:34:43 %S A134380 1,1,1,1,3,1,1,8,5,1,1,24,19,7,1,1,89,71,34,9,1,1,415,290,150,53,11,1, %T A134380 1,2372,1362,672,269,76,13,1,1,16072,7486,3252,1319,436,103,15,1,1, %U A134380 125673,48054,17618,6671,2331,659,134,17,1 %N A134380 A007318 * A084938. %C A134380 Row sums = A134381: (1, 2, 5, 15, 52, 205, 921, ...), binomial transform of A051295. %F A134380 Binomial transform of A084938, as infinite lower triangular matrices. %e A134380 First few rows of the triangle: %e A134380 1; %e A134380 1, 1; %e A134380 1, 3, 1; %e A134380 1, 8, 5, 1; %e A134380 1, 24, 19, 7, 1; %e A134380 1, 89, 71, 34, 9, 1; %e A134380 1, 415, 290, 150, 53, 11, 1; %e A134380 ... %Y A134380 Cf. A084938, A051295, A134381. %K A134380 nonn,tabl %O A134380 0,5 %A A134380 _Gary W. Adamson_, Oct 22 2007