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A299808 Number of n X n 0..1 arrays with every element equal to 0, 1, 3, 4, 5, 6 or 8 king-move adjacent elements, with upper left element zero. 0
1, 4, 12, 476, 11460, 1881856, 1009387819, 1201130067486, 5391490611757566 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Diagonal of A299814.

LINKS

Table of n, a(n) for n=1..9.

EXAMPLE

Some solutions for n=5

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

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

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

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

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

CROSSREFS

Cf. A299814.

Sequence in context: A286881 A291098 A009506 * A085116 A104129 A144631

Adjacent sequences:  A299805 A299806 A299807 * A299809 A299810 A299811

KEYWORD

nonn

AUTHOR

R. H. Hardin, Feb 19 2018

STATUS

approved

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Last modified September 18 19:30 EDT 2021. Contains 347534 sequences. (Running on oeis4.)