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A298495 Number of nXn 0..1 arrays with every element equal to 0, 1, 3, 4 or 7 king-move adjacent elements, with upper left element zero. 0
1, 4, 1, 38, 281, 277, 24272, 1377101, 10659243, 4599990391 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Diagonal of A298501.

LINKS

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

EXAMPLE

Some solutions for n=6

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

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

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

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

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

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

CROSSREFS

Cf. A298501.

Sequence in context: A169656 A303987 A297900 * A193962 A302441 A269906

Adjacent sequences:  A298492 A298493 A298494 * A298496 A298497 A298498

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jan 20 2018

STATUS

approved

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Last modified December 9 03:27 EST 2019. Contains 329872 sequences. (Running on oeis4.)