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Number of 5Xn arrays containing n copies of 0..5-1 with no element 1 greater than its north, northeast or northwest neighbor modulo 5 and the upper left element equal to 0.
0

%I #5 Aug 12 2016 06:53:59

%S 9,525,52149,7517433,1305588167,253772079771,53017222883467,

%T 11639090021203169

%N Number of 5Xn arrays containing n copies of 0..5-1 with no element 1 greater than its north, northeast or northwest neighbor modulo 5 and the upper left element equal to 0.

%C Row 5 of A266886.

%e Some solutions for n=3

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

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

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

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

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

%Y Cf. A266886.

%K nonn

%O 1,1

%A _R. H. Hardin_, Jan 05 2016