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Number of 5Xn arrays containing n copies of 0..5-1 with every element equal to or 1 greater than any north or northeast neighbors modulo 5 and the upper left element equal to 0.
0

%I #5 Aug 12 2016 06:54:01

%S 1,2,5,14,55,287,2165,21835,252726,3096256,38732624,488632335,

%T 6180876159,78236666009,990197916540,12529967750879,158558090021956,

%U 2007064954804659

%N Number of 5Xn arrays containing n copies of 0..5-1 with every element equal to or 1 greater than any north or northeast neighbors modulo 5 and the upper left element equal to 0.

%C Row 5 of A267553.

%e Some solutions for n=4

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

%e ..1..1..2..2....1..1..2..3....1..1..2..3....1..2..2..3....0..0..1..2

%e ..2..2..3..3....1..2..3..4....2..2..3..4....2..3..3..4....1..1..2..3

%e ..3..3..4..4....2..3..4..4....3..3..4..0....3..4..4..0....2..2..3..4

%e ..4..4..0..0....3..4..0..0....4..4..0..0....4..0..0..1....3..3..4..4

%Y Cf. A267553.

%K nonn

%O 1,2

%A _R. H. Hardin_, Jan 17 2016