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A183728 1/12 the number of (n+1) X 9 0..5 arrays with every 2 X 2 subblock strictly increasing clockwise or counterclockwise with one decrease, and at least two adjacent blocks having the same increasing direction. 0

%I #8 May 27 2021 09:10:55

%S 88331,3528126,130610844,5355252106,221403152762,9546147995730,

%T 460509744129719,33429749952933774,4646656755908387234,

%U 935845545638421963156

%N 1/12 the number of (n+1) X 9 0..5 arrays with every 2 X 2 subblock strictly increasing clockwise or counterclockwise with one decrease, and at least two adjacent blocks having the same increasing direction.

%C Column 8 of A183729.

%e Some solutions with the first block increasing clockwise for 3 X 9:

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

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

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

%e ...

%e ...R..L..L..R..L..R..L..R.......R..L..L..R..L..R..L..R...

%e ...L..R..R..L..R..L..R..L.......L..R..R..L..R..L..R..L...

%Y Cf. A183729.

%K nonn

%O 1,1

%A _R. H. Hardin_, Jan 06 2011

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Last modified April 25 10:01 EDT 2024. Contains 371967 sequences. (Running on oeis4.)