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 A153199 #5 Jan 25 2022 21:40:13 %S A153199 1,1,1,1,2,2,1,3,6,5,1,4,12,20,14,1,5,20,50,70,43,1,6,30,100,210,258, %T A153199 143,1,7,42,175,490,903,1001,509,1,8,56,280,980,2408,4004,4072,1922,1, %U A153199 9,72,420,1764,5418,12012,18324,17298,7651 %N A153199 Triangle read by rows, A007318 * A153198. %C A153199 Row sums = A153197 starting (1, 2, 5, 15, 51, 189, 748, 3138,...). %C A153199 Right border = A006789: (1, 1, 2, 5, 14, 43, 143, 509, 1922,...). %F A153199 Binomial transform of triangle A153198, where A153198 = an infinite lower triangular matrix with the Bessel numbers A006789 as the main diagonal and the rest 0's. %e A153199 First few rows of the triangle = %e A153199 1; %e A153199 1, 1; %e A153199 1, 2, 2; %e A153199 1, 3, 6, 5; %e A153199 1, 4, 12, 20, 14; %e A153199 1, 5, 20, 50, 70, 43; %e A153199 1, 6, 30, 100, 210, 258, 143; %e A153199 1, 7, 42, 175, 490, 903, 1001, 509; %e A153199 1, 8, 56, 280, 980, 2408, 4004, 4072, 1922; %e A153199 1, 9, 72, 420, 1764, 5418, 12012, 18324, 17298, 7651; %e A153199 1, 10, 90, 600, 2940, 10836, 30030, 61080, 86490, 76510, 31965; %e A153199 ... %Y A153199 Cf. A153197, A153198, A006789. %K A153199 nonn,tabl %O A153199 0,5 %A A153199 _Gary W. Adamson_, Dec 20 2008