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A223038 Number of nX3 0..3 arrays with no more than floor(nX3/2) elements equal to at least one horizontal, diagonal or antidiagonal neighbor, with new values introduced in row major 0..3 order.

%I A223038 #7 Jul 23 2025 03:24:40
%S A223038 2,98,3780,255943,10904199,751990800,33007705273,2293741863398,
%T A223038 102466787449225,7147587418650349,323100169712798727,
%U A223038 22585791054054582654,1029786157956416130280,72077809347126994984977
%N A223038 Number of nX3 0..3 arrays with no more than floor(nX3/2) elements equal to at least one horizontal, diagonal or antidiagonal neighbor, with new values introduced in row major 0..3 order.
%C A223038 Column 3 of A223041
%H A223038 R. H. Hardin, <a href="/A223038/b223038.txt">Table of n, a(n) for n = 1..114</a>
%e A223038 Some solutions for n=3
%e A223038 ..0..1..2....0..1..2....0..1..0....0..1..0....0..1..2....0..1..2....0..0..1
%e A223038 ..2..1..2....3..1..3....1..2..0....1..2..0....0..3..2....3..1..2....2..1..2
%e A223038 ..0..0..1....1..1..0....0..3..3....1..3..3....3..3..2....0..3..0....2..3..2
%K A223038 nonn
%O A223038 1,1
%A A223038 _R. H. Hardin_ Mar 12 2013