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A221424 Number of 6Xn 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
0, 64, 2250, 107695, 3813004, 156275181, 6079373768, 237226735061 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Row 6 of A221419

LINKS

Table of n, a(n) for n=1..8.

EXAMPLE

Some solutions for n=3

..0..2..2....2..0..0....2..0..2....2..0..2....2..2..0....0..2..0....2..2..0

..0..0..2....2..2..0....0..2..0....0..2..2....0..0..2....2..2..0....0..0..2

..2..0..0....2..0..0....2..2..0....0..0..2....2..0..0....0..2..2....0..2..2

..0..2..0....0..2..2....0..2..0....0..2..0....0..2..2....0..2..0....0..0..0

..2..2..0....2..2..0....0..2..0....2..0..0....0..2..0....0..2..0....2..2..0

..2..2..0....0..2..0....2..0..2....0..2..2....2..2..0....2..2..0....0..2..2

CROSSREFS

Sequence in context: A008790 A183432 A017211 * A181241 A053107 A330820

Adjacent sequences:  A221421 A221422 A221423 * A221425 A221426 A221427

KEYWORD

nonn

AUTHOR

R. H. Hardin Jan 15 2013

STATUS

approved

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Last modified June 26 07:31 EDT 2022. Contains 354877 sequences. (Running on oeis4.)