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A222876 Number of nX6 0..3 arrays with no more than floor(nX6/2) elements equal to at least one horizontal or antidiagonal neighbor, with new values introduced in row major 0..3 order.

%I A222876 #6 Jul 23 2025 03:11:44
%S A222876 131,399849,1340197778,4643150795564,16364046520925461,
%T A222876 58365501277437736651,209946033151635587197031,
%U A222876 760026285340633515213165141,2765078298066978400951570461522
%N A222876 Number of nX6 0..3 arrays with no more than floor(nX6/2) elements equal to at least one horizontal or antidiagonal neighbor, with new values introduced in row major 0..3 order.
%C A222876 Column 6 of A222878
%H A222876 R. H. Hardin, <a href="/A222876/b222876.txt">Table of n, a(n) for n = 1..27</a>
%e A222876 Some solutions for n=3
%e A222876 ..0..0..0..0..1..2....0..0..0..0..1..2....0..0..0..0..1..2....0..0..0..0..1..0
%e A222876 ..0..0..0..2..0..3....0..0..0..2..0..2....0..0..1..1..0..1....0..0..1..2..3..0
%e A222876 ..0..2..1..3..0..3....1..2..1..0..3..1....2..0..3..1..0..3....0..2..1..3..2..0
%K A222876 nonn
%O A222876 1,1
%A A222876 _R. H. Hardin_ Mar 08 2013