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Number of 6Xn arrays containing n copies of 0..6-1 with every element equal to or 1 greater than any southwest or northwest neighbors modulo 6 and the upper left element equal to 0.
0

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

%S 120,0,0,0,0,1,38,8314,552162,14897883,202307164,1740883167,

%T 9375189986,39259985155,135039588180,462186051984

%N Number of 6Xn arrays containing n copies of 0..6-1 with every element equal to or 1 greater than any southwest or northwest neighbors modulo 6 and the upper left element equal to 0.

%C Row 6 of A267328.

%e Some solutions for n=7

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

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

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

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

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

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

%Y Cf. A267328.

%K nonn

%O 1,1

%A _R. H. Hardin_, Jan 13 2016