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A222674 Number of nX3 0..3 arrays with no more than floor(nX3/2) elements unequal to at least one horizontal, diagonal or antidiagonal neighbor, with new values introduced in row major 0..3 order.

%I A222674 #7 Jul 23 2025 02:54:29
%S A222674 1,5,11,130,670,9587,51055,832433,4403793,76270010,393405671,
%T A222674 7110030015,35866532209,668872050090,3316350242047,63280853470227,
%U A222674 309953030601699,6011655335449938,29208300615650596,572992311551819596
%N A222674 Number of nX3 0..3 arrays with no more than floor(nX3/2) elements unequal to at least one horizontal, diagonal or antidiagonal neighbor, with new values introduced in row major 0..3 order.
%C A222674 Column 3 of A222679
%H A222674 R. H. Hardin, <a href="/A222674/b222674.txt">Table of n, a(n) for n = 1..208</a>
%e A222674 Some solutions for n=3
%e A222674 ..0..0..0....0..1..1....0..1..2....0..0..1....0..0..0....0..0..0....0..0..0
%e A222674 ..0..0..0....1..1..1....1..1..1....0..0..0....0..0..0....0..0..1....1..0..0
%e A222674 ..0..0..0....1..1..1....1..1..1....0..0..0....1..0..1....0..0..0....0..0..0
%K A222674 nonn
%O A222674 1,2
%A A222674 _R. H. Hardin_ Feb 28 2013