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 A222662 Number of nX4 0..3 arrays with exactly floor(nX4/2) elements unequal to at least one horizontal, vertical or antidiagonal neighbor, with new values introduced in row major 0..3 order 1

%I

%S 3,9,44,452,4241,62406,1058776,17374571,288771291,4860565711,

%T 81668904553,1371394427050,23054727857828,387744337542770,

%U 6522573483253608,109759232573531088,1847613631016545713,31110964472846965874

%N Number of nX4 0..3 arrays with exactly floor(nX4/2) elements unequal to at least one horizontal, vertical or antidiagonal neighbor, with new values introduced in row major 0..3 order

%C Column 4 of A222666

%H R. H. Hardin, <a href="/A222662/b222662.txt">Table of n, a(n) for n = 1..87</a>

%e Some solutions for n=3

%e ..0..0..1..1....0..0..0..0....0..0..0..1....0..1..1..1....0..0..0..1

%e ..0..1..1..1....0..0..0..0....0..0..1..1....1..1..1..1....0..0..0..2

%e ..2..1..1..1....1..1..0..0....0..1..1..1....0..1..1..1....0..0..0..0

%K nonn

%O 1,1

%A _R. H. Hardin_ Feb 28 2013

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Last modified December 8 08:06 EST 2021. Contains 349594 sequences. (Running on oeis4.)