cp's OEIS Frontend

A222905 Number of nX7 0..3 arrays with no more than floor(nX7/2) elements unequal to at least one horizontal or antidiagonal neighbor, with new values introduced in row major 0..3 order.

%I A222905 #6 Jul 23 2025 03:14:27
%S A222905 17,1710,82020,21064292,1616042692,577820456398,51666240687220,
%T A222905 19807159813457951,1817220105168370585,706854001296049850823,
%U A222905 65258971099531300247508,25532711765112846282295184
%N A222905 Number of nX7 0..3 arrays with no more than floor(nX7/2) elements unequal to at least one horizontal or antidiagonal neighbor, with new values introduced in row major 0..3 order.
%C A222905 Column 7 of A222906
%H A222905 R. H. Hardin, <a href="/A222905/b222905.txt">Table of n, a(n) for n = 1..25</a>
%e A222905 Some solutions for n=3
%e A222905 ..0..1..1..0..0..0..0....0..0..0..0..0..0..0....0..0..0..0..0..0..0
%e A222905 ..2..0..0..0..0..0..1....0..1..2..0..0..0..0....1..2..0..0..0..0..0
%e A222905 ..0..0..0..0..0..0..3....0..1..1..0..0..0..0....3..1..2..0..0..0..0
%K A222905 nonn
%O A222905 1,1
%A A222905 _R. H. Hardin_ Mar 09 2013