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A298583 Number of n X n 0..1 arrays with every element equal to 0, 3, 4, 5 or 7 king-move adjacent elements, with upper left element zero. 0
1, 1, 9, 4, 65, 1112, 26343, 3833927, 1239155011, 967049306590 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

COMMENTS

Diagonal of A298589.

LINKS

Table of n, a(n) for n=1..10.

EXAMPLE

Some solutions for n=5

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

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

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

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

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

CROSSREFS

Cf. A298589.

Sequence in context: A122846 A248309 A317900 * A038294 A214102 A321575

Adjacent sequences: A298580 A298581 A298582 * A298584 A298585 A298586

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jan 22 2018

STATUS

approved

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Last modified December 1 08:20 EST 2022. Contains 358458 sequences. (Running on oeis4.)