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 A116407 #8 Feb 21 2024 08:18:54 %S A116407 1,1,1,3,1,1,7,3,2,1,19,6,7,3,1,51,15,20,11,4,1,141,36,61,34,16,5,1, %T A116407 393,91,182,105,55,22,6,1,1107,232,546,314,183,83,29,7,1,3139,603, %U A116407 1632,930,588,295,119,37,8,1,8953,1585,4875,2727,1858,1001,451,164,46,9,1 %N A116407 Triangle whose k-th column has e.g.f. exp(x)*sum{j=0..k, (-1)^j*Bessel_I(k+j,2x)}. %C A116407 First column is A002426. Second column is A005043(n+1). Third column is A116408. %C A116407 Row sums are A116409. Product of A007318 and A116405. %e A116407 Triangle begins: %e A116407 1; %e A116407 1, 1; %e A116407 3, 1, 1; %e A116407 7, 3, 2, 1; %e A116407 19, 6, 7, 3, 1; %e A116407 51, 15, 20, 11, 4, 1; %e A116407 ... %Y A116407 Cf. A002426, A005043, A116408, A116409, A007318, A116405. %K A116407 easy,nonn,tabl %O A116407 0,4 %A A116407 _Paul Barry_, Feb 13 2006