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A299568 Number of n X n 0..1 arrays with every element equal to 1, 2, 4, 5, 7 or 8 king-move adjacent elements, with upper left element zero. 0
0, 3, 15, 78, 766, 17389, 784334, 46965400, 5736969146, 1349947112124 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Diagonal of A299574.

LINKS

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

EXAMPLE

Some solutions for n=6

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

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

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

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

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

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

CROSSREFS

Cf. A299574.

Sequence in context: A297952 A298771 A298576 * A031884 A337284 A186942

Adjacent sequences:  A299565 A299566 A299567 * A299569 A299570 A299571

KEYWORD

nonn

AUTHOR

R. H. Hardin, Feb 13 2018

STATUS

approved

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Last modified July 4 20:49 EDT 2022. Contains 355086 sequences. (Running on oeis4.)