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 A233306 #5 Jul 23 2025 07:59:15
%S A233306 258,5964,135636,2694620,48504411,789640245,11764401320,161499728247,
%T A233306 2058135563687
%N A233306 Number of (6+1)X(n+1) 0..1 arrays x(i,j) with row sums sum{x(i,j), j=1..n+1} nondecreasing, and column sums sum{i^2*x(i,j), i=1..6+1} nondecreasing.
%C A233306 Row 6 of A233301
%e A233306 Some solutions for n=3
%e A233306 ..0..0..1..0....0..1..0..0....0..0..0..0....0..0..0..0....0..1..0..0
%e A233306 ..1..1..0..0....0..1..0..0....0..0..0..0....1..0..1..0....1..0..0..0
%e A233306 ..1..0..1..0....0..0..1..0....0..1..0..0....1..0..1..0....0..0..0..1
%e A233306 ..0..1..0..1....1..1..0..0....0..0..0..1....0..0..1..1....0..0..1..0
%e A233306 ..0..1..1..0....1..0..1..0....0..0..1..0....1..1..0..1....0..0..0..1
%e A233306 ..0..1..0..1....0..0..1..1....0..0..0..1....0..1..1..1....1..0..1..0
%e A233306 ..1..0..1..1....0..1..0..1....0..1..1..1....1..1..1..1....0..1..0..1
%K A233306 nonn
%O A233306 1,1
%A A233306 _R. H. Hardin_, Dec 07 2013