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A222950 Number of nX2 0..3 arrays with no adjacent rows or columns having the same least squares slope fit to a straight line, with a single point array taken as having zero slope.

%I A222950 #7 Jul 23 2025 03:18:21
%S A222950 0,212,2256,36302,455904,6471572,84040156,1156716696,15178933676,
%T A222950 206025068636,2712435820392,36611998287306,483144415956072,
%U A222950 6500119089674696,85910716717515264,1153267214849914148
%N A222950 Number of nX2 0..3 arrays with no adjacent rows or columns having the same least squares slope fit to a straight line, with a single point array taken as having zero slope.
%C A222950 Column 2 of A222953
%H A222950 R. H. Hardin, <a href="/A222950/b222950.txt">Table of n, a(n) for n = 1..24</a>
%e A222950 Some solutions for n=3
%e A222950 ..3..3....2..2....2..1....2..3....3..1....1..1....2..1....1..0....2..0....3..0
%e A222950 ..2..1....1..2....3..3....3..1....3..3....1..2....2..2....0..0....2..2....3..1
%e A222950 ..0..3....1..3....1..2....1..0....0..1....1..3....2..0....0..2....2..1....3..3
%K A222950 nonn
%O A222950 1,2
%A A222950 _R. H. Hardin_ Mar 10 2013