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 A222956 #6 Jul 23 2025 03:18:55 %S A222956 4,4,16,16,64,64,400,324,2704,2304,23104,19044,222784,183184,2310400, %T A222956 1937664,25441936,21641104,292820544,252301456,3481944064,3038655376, %U A222956 42543187600,37528988176,531580977216,473355008064,6768530689600 %N A222956 Number of nX3 0..1 arrays with every row and column least squares fitting to a zero slope straight line, with a single point array taken as having zero slope. %C A222956 Column 3 of A222959 %H A222956 R. H. Hardin, <a href="/A222956/b222956.txt">Table of n, a(n) for n = 1..75</a> %e A222956 Some solutions for n=4 %e A222956 ..1..0..1....0..0..0....1..1..1....1..0..1....1..0..1....0..0..0....1..0..1 %e A222956 ..0..0..0....0..1..0....1..1..1....1..1..1....1..0..1....0..0..0....0..1..0 %e A222956 ..0..0..0....0..1..0....1..1..1....1..1..1....1..0..1....0..0..0....0..1..0 %e A222956 ..1..0..1....0..0..0....1..1..1....1..0..1....1..0..1....0..0..0....1..0..1 %K A222956 nonn %O A222956 1,1 %A A222956 _R. H. Hardin_ Mar 10 2013