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A222653 Number of nX4 0..3 arrays with no more than floor(nX4/2) elements equal to at least one king-move neighbor, with new values introduced in row major 0..3 order.

%I A222653 #6 Jul 23 2025 02:52:35
%S A222653 11,724,61757,5024944,411489189,33625853402,2757290901238,
%T A222653 226934394962954,18748702054088170,1554468757231979806,
%U A222653 129297779576953689571,10785833060389951147809,902060948747063990782774
%N A222653 Number of nX4 0..3 arrays with no more than floor(nX4/2) elements equal to at least one king-move neighbor, with new values introduced in row major 0..3 order.
%C A222653 Column 4 of A222654
%H A222653 R. H. Hardin, <a href="/A222653/b222653.txt">Table of n, a(n) for n = 1..18</a>
%e A222653 Some solutions for n=3
%e A222653 ..0..0..1..0....0..1..2..0....0..1..0..0....0..1..1..2....0..1..2..0
%e A222653 ..1..2..3..2....2..3..3..3....2..3..2..3....3..3..0..3....2..1..0..1
%e A222653 ..3..2..2..0....0..2..3..2....2..1..2..0....1..2..0..1....3..1..3..0
%K A222653 nonn
%O A222653 1,1
%A A222653 _R. H. Hardin_ Feb 27 2013