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A219145 Unchanging value maps: number of 4Xn binary arrays indicating the locations of corresponding elements unequal to no horizontal, diagonal or antidiagonal neighbor in a random 0..2 4Xn array 0
1, 51, 331, 1774, 10505, 59127, 341648, 1963817, 11341895, 65406069, 377314947, 2175983774, 12550566460, 72389111386, 417539600863, 2408347532016, 13891206637891 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Row 4 of A219142

LINKS

Table of n, a(n) for n=1..17.

EXAMPLE

Some solutions for n=3

..0..0..1....0..0..0....0..0..1....0..1..0....0..0..0....1..0..0....0..0..0

..0..0..1....0..0..1....1..0..0....0..0..0....0..0..1....1..0..0....0..0..1

..1..0..0....1..0..0....1..0..1....1..0..1....1..0..0....1..0..0....1..0..1

..0..0..1....0..0..0....1..1..1....0..0..1....1..0..1....1..0..1....1..1..1

CROSSREFS

Sequence in context: A251351 A251344 A245362 * A155464 A165087 A152579

Adjacent sequences:  A219142 A219143 A219144 * A219146 A219147 A219148

KEYWORD

nonn

AUTHOR

R. H. Hardin Nov 12 2012

STATUS

approved

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Last modified August 8 06:27 EDT 2020. Contains 336290 sequences. (Running on oeis4.)