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A221509 Number of 3Xn arrays of occupancy after each element moves to some horizontal, diagonal or antidiagonal neighbor, without consecutive moves in the same direction 0

%I #3 Jan 18 2013 17:50:40

%S 0,64,664,31663,730874,22664752,617892584,17782943460,499912745268,

%T 14194927933912,401323009766448,11367289765226164,321716709992052606,

%U 9108319376609834007,257833317722010551358,7299063007433073641077

%N Number of 3Xn arrays of occupancy after each element moves to some horizontal, diagonal or antidiagonal neighbor, without consecutive moves in the same direction

%C Row 3 of A221507

%e Some solutions for n=3

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

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

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

%K nonn

%O 1,2

%A _R. H. Hardin_ Jan 18 2013

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Last modified March 28 17:42 EDT 2024. Contains 371254 sequences. (Running on oeis4.)