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Number of 7Xn arrays containing n copies of 0..7-1 with every element equal to or 1 greater than any north, west or southwest neighbors modulo 7 and the upper left element equal to 0.
0

%I #5 Aug 12 2016 06:54:00

%S 1,1,2,2,4,9,649,25661,413155,3534075,21319105,108404456,526041190,

%T 2738297888

%N Number of 7Xn arrays containing n copies of 0..7-1 with every element equal to or 1 greater than any north, west or southwest neighbors modulo 7 and the upper left element equal to 0.

%C Row 7 of A267338.

%e Some solutions for n=7

%e ..0..0..1..2..3..4..5....0..1..2..3..4..5..6....0..0..1..2..2..3..4

%e ..0..1..1..2..3..4..5....1..2..2..3..4..5..6....0..1..1..2..3..4..5

%e ..0..1..2..3..4..5..6....2..2..3..4..5..6..0....0..1..2..3..4..5..6

%e ..1..2..2..3..4..5..6....2..3..4..5..6..0..1....1..2..3..4..5..6..6

%e ..1..2..3..4..5..6..0....3..3..4..5..6..0..1....1..2..3..4..5..6..0

%e ..2..3..4..5..6..6..0....3..4..5..6..0..1..1....2..3..4..5..6..6..0

%e ..3..4..5..6..6..0..1....4..5..6..0..0..1..2....3..4..5..5..6..0..1

%Y Cf. A267338.

%K nonn

%O 1,3

%A _R. H. Hardin_, Jan 13 2016