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A221423 Number of 5 X n arrays of occupancy after each element stays put or moves to some horizontal or antidiagonal neighbor, with every occupancy equal to zero or two. 0

%I #5 Jun 26 2018 15:48:37

%S 0,32,0,13794,0,5501288,0,2238166260,0,896266172750,0,356943936626267,

%T 0,141932444866235538,0,56407987494575281915,0,

%U 22414489809013612468416,0,8906243419860155512004653

%N Number of 5 X n arrays of occupancy after each element stays put or moves to some horizontal or antidiagonal neighbor, with every occupancy equal to zero or two.

%e Some solutions for n=4

%e ..2..0..0..2....2..0..0..2....2..0..2..0....0..2..0..2....2..0..2..0

%e ..0..2..2..2....2..0..0..2....2..2..2..0....2..0..0..2....2..0..0..2

%e ..0..2..2..0....2..2..0..0....0..2..2..0....2..0..0..2....2..0..0..0

%e ..0..0..0..2....0..2..2..2....0..0..2..0....2..0..0..0....2..2..2..0

%e ..2..0..0..2....0..0..2..0....2..0..0..2....2..0..2..2....2..0..0..2

%Y Row 5 of A221419.

%K nonn

%O 1,2

%A _R. H. Hardin_, Jan 15 2013

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Last modified March 28 16:05 EDT 2024. Contains 371254 sequences. (Running on oeis4.)