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A299384 Number of n X n 0..1 arrays with every element equal to 0, 1, 2, 4, 6 or 8 king-move adjacent elements, with upper left element zero. 0
1, 7, 20, 46, 310, 1002, 4929, 28917, 170693, 1255834, 10402982, 92718038 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Diagonal of A299388.

LINKS

Table of n, a(n) for n=1..12.

EXAMPLE

Some solutions for n=7

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

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

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

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

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

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

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

CROSSREFS

Cf. A299388.

Sequence in context: A159222 A100206 A298288 * A007044 A047862 A264879

Adjacent sequences:  A299381 A299382 A299383 * A299385 A299386 A299387

KEYWORD

nonn

AUTHOR

R. H. Hardin, Feb 09 2018

STATUS

approved

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Last modified October 31 00:19 EDT 2020. Contains 338095 sequences. (Running on oeis4.)