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A299459 Number of n X n 0..1 arrays with every element equal to 1, 2, 3, 5, 6 or 8 king-move adjacent elements, with upper left element zero. 0
0, 4, 57, 1013, 52002, 4175049, 546467591, 209501211322, 137356353424270 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Diagonal of A299465.

LINKS

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

EXAMPLE

Some solutions for n=5

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

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

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

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

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

CROSSREFS

Cf. A299465.

Sequence in context: A071540 A298764 A299562 * A300103 A358687 A209317

Adjacent sequences: A299456 A299457 A299458 * A299460 A299461 A299462

KEYWORD

nonn

AUTHOR

R. H. Hardin, Feb 10 2018

STATUS

approved

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Last modified December 1 00:42 EST 2022. Contains 358453 sequences. (Running on oeis4.)