cp's OEIS Frontend

A222827 Number of nX4 0..3 arrays with no more than floor(nX4/2) elements equal to at least one horizontal, vertical or antidiagonal neighbor, with new values introduced in row major 0..3 order.

%I A222827 #6 Jul 23 2025 03:06:55
%S A222827 11,1154,163059,23664739,3489313607,520160675223,78214529020708,
%T A222827 11843031775865125,1803481044258862295,275936349234703904616,
%U A222827 42386246052840276405669,6532812606151325343712993
%N A222827 Number of nX4 0..3 arrays with no more than floor(nX4/2) elements equal to at least one horizontal, vertical or antidiagonal neighbor, with new values introduced in row major 0..3 order.
%C A222827 Column 4 of A222828
%H A222827 R. H. Hardin, <a href="/A222827/b222827.txt">Table of n, a(n) for n = 1..21</a>
%e A222827 Some solutions for n=3
%e A222827 ..0..1..1..2....0..1..2..3....0..1..1..2....0..1..2..3....0..1..2..3
%e A222827 ..1..3..0..3....2..0..2..2....1..0..1..1....1..3..2..0....2..0..1..3
%e A222827 ..3..3..2..1....1..3..3..0....2..3..2..0....2..3..1..2....2..2..3..2
%K A222827 nonn
%O A222827 1,1
%A A222827 _R. H. Hardin_ Mar 06 2013