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 A222858 #6 Jul 23 2025 03:10:33 %S A222858 10,41,410,2262,22620,156436,1672630,12777951,137893630,1149894920, %T A222858 12404839040,108106327001,1160341870500,10427449608028, %U A222858 111092085640400,1019673460797990,10777772811219450,100433003025931774 %N A222858 Number of nX4 0..1 arrays with every row and column least squares fitting to a nonnegative slope straight line, with a single point array taken as having zero slope. %C A222858 Column 4 of A222862 %H A222858 R. H. Hardin, <a href="/A222858/b222858.txt">Table of n, a(n) for n = 1..19</a> %e A222858 Some solutions for n=3 %e A222858 ..0..0..0..0....0..0..0..0....0..1..1..0....0..0..1..0....0..0..0..0 %e A222858 ..0..1..1..1....0..0..0..1....0..0..1..1....0..0..0..1....1..0..1..1 %e A222858 ..0..1..1..1....1..0..1..1....0..1..1..1....0..1..1..1....0..0..1..1 %K A222858 nonn %O A222858 1,1 %A A222858 _R. H. Hardin_ Mar 07 2013