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A221885 Number of nX4 arrays of occupancy after each element stays put or moves to some horizontal, vertical or antidiagonal neighbor, without consecutive moves in the same direction 0
13, 3223, 449069, 65039658, 9356131846, 1347142288446, 193944559610138, 27922276785982528, 4019968490456852781, 578754876292668561410, 83323335396986744374226, 11996060075504536682447230 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 4 of A221886

LINKS

Table of n, a(n) for n=1..12.

EXAMPLE

Some solutions for n=3

..0..2..0..1....0..2..0..2....0..0..1..1....0..2..0..2....0..3..0..2

..1..2..2..1....0..0..1..3....1..3..0..1....0..0..0..2....1..0..1..1

..0..0..2..1....3..0..1..0....1..0..2..2....1..3..1..1....0..1..2..1

CROSSREFS

Sequence in context: A220642 A260982 A159357 * A134159 A221851 A221924

Adjacent sequences:  A221882 A221883 A221884 * A221886 A221887 A221888

KEYWORD

nonn

AUTHOR

R. H. Hardin Jan 30 2013

STATUS

approved

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Last modified August 16 05:55 EDT 2022. Contains 356160 sequences. (Running on oeis4.)