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A306047 Number of nXn 0..1 arrays with every element unequal to 0, 1, 2, 3, 6 or 7 king-move adjacent elements, with upper left element zero. 0
1, 8, 45, 458, 12349, 554682, 36596835, 8395262149, 4973359586800, 4903224406630694 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Diagonal of A306053.

LINKS

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

EXAMPLE

Some solutions for n=5

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

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

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

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

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

CROSSREFS

Cf. A306053.

Sequence in context: A009369 A120044 A002686 * A110348 A296945 A328198

Adjacent sequences:  A306044 A306045 A306046 * A306048 A306049 A306050

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jun 18 2018

STATUS

approved

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Last modified October 15 00:14 EDT 2019. Contains 328025 sequences. (Running on oeis4.)