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A298706 Number of n X n 0..1 arrays with every element equal to 1, 3, 4, 6 or 7 king-move adjacent elements, with upper left element zero. 0
0, 4, 0, 11, 781, 3950, 17377, 8695221, 359275256, 26141521994 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Diagonal of A298712.

LINKS

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

EXAMPLE

Some solutions for n=5

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

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

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

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

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

CROSSREFS

Cf. A298712.

Sequence in context: A019207 A298449 A298056 * A260490 A349712 A349711

Adjacent sequences:  A298703 A298704 A298705 * A298707 A298708 A298709

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jan 25 2018

STATUS

approved

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Last modified May 16 10:04 EDT 2022. Contains 353700 sequences. (Running on oeis4.)