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 A233299 #5 Jul 23 2025 07:58:47
%S A233299 22,105,567,3556,21856,135636,836259,5134856,31326263,190404404,
%T A233299 1153108628,6966626079,42004555617,252889763684
%N A233299 Number of (n+1)X(3+1) 0..1 arrays x(i,j) with row sums sum{x(i,j), j=1..3+1} nondecreasing, and column sums sum{i^2*x(i,j), i=1..n+1} nondecreasing.
%C A233299 Column 3 of A233301
%e A233299 Some solutions for n=5
%e A233299 ..1..0..0..0....0..0..0..1....0..1..1..0....0..0..1..0....0..1..1..0
%e A233299 ..1..0..0..1....1..0..0..0....0..1..0..1....0..0..0..1....0..1..1..0
%e A233299 ..1..1..0..0....0..0..0..1....1..0..0..1....0..0..1..0....1..1..0..0
%e A233299 ..1..1..0..0....1..1..0..0....0..1..1..0....0..0..0..1....0..0..1..1
%e A233299 ..1..0..1..1....0..0..1..1....0..1..0..1....0..0..0..1....1..0..0..1
%e A233299 ..0..1..1..1....0..1..1..1....0..0..1..1....0..1..1..1....0..1..1..1
%K A233299 nonn
%O A233299 1,1
%A A233299 _R. H. Hardin_, Dec 07 2013