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A302004 Number of 7Xn 0..1 arrays with every element equal to 1, 2 or 4 horizontally or antidiagonally adjacent elements, with upper left element zero. 1
0, 233, 499, 1394, 110036, 729297, 15243860, 204666568, 2933712940, 44201068772, 631467436258, 9310616032492, 135219892970154, 1977188363830961, 28827781254085548, 420748594948205104, 6138969205830064789 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Row 7 of A301999.

LINKS

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

EXAMPLE

Some solutions for n=5

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

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

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

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

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

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

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

CROSSREFS

Cf. A301999.

Sequence in context: A154621 A243891 A142644 * A308786 A097447 A142783

Adjacent sequences: A302001 A302002 A302003 * A302005 A302006 A302007

KEYWORD

nonn

AUTHOR

R. H. Hardin, Mar 30 2018

STATUS

approved

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Last modified January 31 16:02 EST 2023. Contains 359976 sequences. (Running on oeis4.)