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 A222856 #6 Jul 23 2025 03:09:51 %S A222856 3,6,18,41,123,310,957,2530,7848,21618,67131,188835,585276,1670602, %T A222856 5161503,14880389,45808419,133004125,408229851,1191329175,3646802121, %U A222856 10684589006,32632896159,95903053435,292350907470,861289976308 %N A222856 Number of nX2 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 A222856 Column 2 of A222862 %H A222856 R. H. Hardin, <a href="/A222856/b222856.txt">Table of n, a(n) for n = 1..63</a> %e A222856 Some solutions for n=3 %e A222856 ..1..1....0..0....0..0....0..0....0..0....0..0....0..1....1..1....0..1....0..1 %e A222856 ..0..0....0..0....1..1....0..0....0..0....0..1....0..1....0..1....0..0....0..0 %e A222856 ..1..1....1..1....0..1....0..1....0..0....0..0....1..1....1..1....0..1....1..1 %K A222856 nonn %O A222856 1,1 %A A222856 _R. H. Hardin_ Mar 07 2013