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A222877 Number of nX7 0..3 arrays with no more than floor(nX7/2) elements equal to at least one horizontal or antidiagonal neighbor, with new values introduced in row major 0..3 order.

%I A222877 #6 Jul 23 2025 03:11:51
%S A222877 438,6013669,66248732403,1036481888251762,11989849992460360377,
%T A222877 192967638304466060567720,2288814374497410957902034456,
%U A222877 37306843891418465461998644495695,449110977900671215379544970452138247
%N A222877 Number of nX7 0..3 arrays with no more than floor(nX7/2) elements equal to at least one horizontal or antidiagonal neighbor, with new values introduced in row major 0..3 order.
%C A222877 Column 7 of A222878
%H A222877 R. H. Hardin, <a href="/A222877/b222877.txt">Table of n, a(n) for n = 1..13</a>
%e A222877 Some solutions for n=3
%e A222877 ..0..0..0..0..1..2..0....0..0..0..0..1..2..3....0..0..0..0..1..2..3
%e A222877 ..0..0..0..3..1..1..0....0..0..0..0..3..1..2....0..0..0..3..1..2..3
%e A222877 ..0..1..0..3..2..1..3....0..0..1..0..2..3..0....0..1..0..2..3..2..0
%K A222877 nonn
%O A222877 1,1
%A A222877 _R. H. Hardin_ Mar 08 2013