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A198911 Number of nX5 0..7 arrays with values 0..7 introduced in row major order and no element equal to any horizontal or vertical neighbor.

%I A198911 #7 Jul 22 2025 13:07:15
%S A198911 15,10867,54381563,481871809749,4717456775959530,46891073386615240710,
%T A198911 467181941240736711604077,4656280284540702751242128730,
%U A198911 46410545076265038917843608182171,462591920649454036671348839366018986
%N A198911 Number of nX5 0..7 arrays with values 0..7 introduced in row major order and no element equal to any horizontal or vertical neighbor.
%C A198911 Column 5 of A198914
%H A198911 R. H. Hardin, <a href="/A198911/b198911.txt">Table of n, a(n) for n = 1..24</a>
%e A198911 Some solutions with values 0 to 7 for n=3
%e A198911 ..0..1..2..3..2....0..1..2..3..4....0..1..0..2..3....0..1..2..3..4
%e A198911 ..1..0..3..2..3....1..0..5..1..6....1..0..3..4..5....1..0..5..2..3
%e A198911 ..2..4..5..6..7....0..7..4..3..1....6..4..2..7..0....0..6..3..5..7
%K A198911 nonn
%O A198911 1,1
%A A198911 _R. H. Hardin_ Oct 31 2011