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A317859 Number of nX4 0..1 arrays with every element unequal to 1, 2 or 4 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero. 1
2, 10, 19, 56, 155, 313, 851, 2147, 5513, 14288, 37168, 97738, 256043, 672477, 1769569, 4660622, 12294064, 32431038, 85627690, 226117938, 597377797, 1578473210, 4171676388, 11026596808, 29148466909, 77059555630, 203733482276 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 4 of A317863.

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..210

EXAMPLE

Some solutions for n=5

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

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

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

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

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

CROSSREFS

Cf. A317863.

Sequence in context: A039560 A299577 A259096 * A009342 A306105 A038103

Adjacent sequences:  A317856 A317857 A317858 * A317860 A317861 A317862

KEYWORD

nonn

AUTHOR

R. H. Hardin, Aug 09 2018

STATUS

approved

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Last modified May 26 13:05 EDT 2019. Contains 323586 sequences. (Running on oeis4.)