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 A116399 #2 Mar 30 2012 18:59:14
%S A116399 1,0,1,2,1,1,0,3,1,1,6,4,5,1,1,0,10,5,6,1,1,20,15,21,7,7,1,1,0,35,21,
%T A116399 28,8,8,1,1,70,56,84,36,37,9,9,1,1,0,126,84,120,45,46,10,10,1,1,252,
%U A116399 210,330,165,175,56,56,11,11,1,1
%N A116399 Triangle whose k-th column has e.g.f. sum{j=0..k, Bessel_I(k+j,2x)}.
%C A116399 Second column is A037952. Third column is the double of A002054. Product of A007318 and A116399 is A116401.
%e A116399 Triangle begins
%e A116399 1,
%e A116399 0, 1,
%e A116399 2, 1, 1,
%e A116399 0, 3, 1, 1,
%e A116399 6, 4, 5, 1, 1,
%e A116399 0, 10, 5, 6, 1, 1,
%e A116399 20, 15, 21, 7, 7, 1, 1
%K A116399 easy,nonn,tabl
%O A116399 0,4
%A A116399 _Paul Barry_, Feb 13 2006