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A301908 Number of 4Xn 0..1 arrays with every element equal to 0, 2 or 3 horizontally or antidiagonally adjacent elements, with upper left element zero. 1
8, 1, 7, 5, 8, 40, 96, 316, 1078, 3831, 13331, 46127, 161362, 564617, 1975369, 6914911, 24216868, 84826850, 297130258, 1040826424, 3646117344, 12772898193, 44745724111, 156753135377, 549139791596, 1923758528089, 6739359943131 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Row 4 of A301906.

LINKS

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

EXAMPLE

Some solutions for n=5

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

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

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

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

CROSSREFS

Cf. A301906.

Sequence in context: A195489 A245280 A200585 * A200277 A242024 A159642

Adjacent sequences:  A301905 A301906 A301907 * A301909 A301910 A301911

KEYWORD

nonn

AUTHOR

R. H. Hardin, Mar 28 2018

STATUS

approved

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Last modified February 19 20:54 EST 2019. Contains 320328 sequences. (Running on oeis4.)