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A298056 Number of n X n 0..1 arrays with every element equal to 1, 3, 4 or 6 king-move adjacent elements, with upper left element zero. 0
0, 4, 0, 11, 441, 474, 11025, 2461790, 26389664, 6708989807 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Diagonal of A298063.

LINKS

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

EXAMPLE

Some solutions for n=7

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

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

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

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

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

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

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

CROSSREFS

Cf. A298063.

Sequence in context: A019127 A019207 A298449 * A298706 A260490 A349712

Adjacent sequences:  A298053 A298054 A298055 * A298057 A298058 A298059

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jan 11 2018

STATUS

approved

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Last modified January 18 06:52 EST 2022. Contains 350454 sequences. (Running on oeis4.)