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A300315 Number of n X n 0..1 arrays with every element equal to 0, 1, 3, 4, 5, 6, 7 or 8 king-move adjacent elements, with upper left element zero. 0
1, 4, 16, 735, 31345, 8002885, 7221094975, 16292595627604, 134432669552429280 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Diagonal of A300321.

LINKS

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

EXAMPLE

Some solutions for n=5

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

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

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

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

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

CROSSREFS

Cf. A300321.

Sequence in context: A218644 A013179 A144177 * A296628 A123234 A198297

Adjacent sequences:  A300312 A300313 A300314 * A300316 A300317 A300318

KEYWORD

nonn

AUTHOR

R. H. Hardin, Mar 02 2018

STATUS

approved

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Last modified September 23 14:40 EDT 2021. Contains 347618 sequences. (Running on oeis4.)