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%I #6 Oct 13 2021 00:36:16
%S 115525,205001,431125,1037585,2764525,7969001,24478885,79273025,
%T 268445725,944464601,3434578645,12856134065,49365995725,193928921801,
%U 777715558405,3178692764705,13225029670525
%N Number of (n+1) X 7 0..4 arrays with every 2 X 2 subblock summing to 8.
%C Column 6 of A183652.
%F Empirical: a(n) = 15*a(n-1)-85*a(n-2)+225*a(n-3)-274*a(n-4)+120*a(n-5).
%e Some solutions for 3 X 7
%e ..0..3..1..3..2..1..1....0..4..1..4..3..0..4....0..1..3..0..3..3..1
%e ..3..2..2..2..1..4..2....4..0..3..0..1..4..0....4..3..1..4..1..1..3
%e ..1..2..2..2..3..0..2....0..4..1..4..3..0..4....0..1..3..0..3..3..1
%Y Cf. A183652.
%K nonn
%O 1,1
%A _R. H. Hardin_ Jan 06 2011
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