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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 northeast neighbor modulo 6 and the upper left element equal to 0.
0

%I #5 Aug 12 2016 06:54:16

%S 120,2430,147340,13895954,1578668020,197549600170,26227806728176,

%T 3644859555696454,525118327614214424

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

%C Row 6 of A267836.

%e Some solutions for n=3

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

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

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

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

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

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

%Y Cf. A267836.

%K nonn

%O 1,1

%A _R. H. Hardin_, Jan 21 2016