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%I #5 Aug 12 2016 06:54:00
%S 720,4,4,40,8724,315356,4893787,55479601,912215513
%N Number of 7Xn arrays containing n copies of 0..7-1 with every element equal to or 1 greater than any southwest or northwest neighbors modulo 7 and the upper left element equal to 0.
%C Row 7 of A267278.
%e Some solutions for n=4
%e ..0..5..2..0....0..5..2..0....0..4..1..4....0..4..2..5....0..5..1..6
%e ..4..1..6..3....4..1..6..3....3..0..4..1....3..1..5..3....4..1..5..2
%e ..1..5..2..0....1..5..2..6....6..3..0..4....0..4..2..6....0..4..2..6
%e ..4..2..6..3....4..1..5..3....2..6..3..0....3..1..5..2....3..1..5..3
%e ..1..5..3..6....0..4..2..6....5..2..6..3....0..4..1..6....0..4..2..6
%e ..4..2..6..4....3..1..5..3....1..5..2..6....3..0..5..2....3..1..5..3
%e ..1..5..3..0....0..4..2..6....5..1..5..2....6..4..1..6....0..4..2..6
%Y Cf. A267278.
%K nonn
%O 1,1
%A _R. H. Hardin_, Jan 12 2016