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A306167 Number of nXn 0..1 arrays with every element unequal to 0, 1, 3, 5, 6 or 7 king-move adjacent elements, with upper left element zero. 0
1, 5, 13, 93, 832, 5277, 53834, 722779, 11592019, 300465411, 11442115258 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Diagonal of A306172.

LINKS

Table of n, a(n) for n=1..11.

EXAMPLE

Some solutions for n=5

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

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

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

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

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

CROSSREFS

Cf. A306172.

Sequence in context: A055623 A280294 A304663 * A107171 A309532 A123646

Adjacent sequences:  A306164 A306165 A306166 * A306168 A306169 A306170

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jun 23 2018

STATUS

approved

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Last modified November 30 06:28 EST 2021. Contains 349419 sequences. (Running on oeis4.)