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A317061 Number of nXn 0..1 arrays with every element unequal to 0, 2, 3, 4, 5, 6 or 8 king-move adjacent elements, with upper left element zero. 0
1, 4, 25, 1595, 384535, 354399907, 1197129513001, 14769904681663624, 663063103032213149999 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Diagonal of A317065.

LINKS

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

EXAMPLE

Some solutions for n=5

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

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

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

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

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

CROSSREFS

Cf. A317065.

Sequence in context: A014253 A132553 A305679 * A144229 A316926 A317699

Adjacent sequences:  A317058 A317059 A317060 * A317062 A317063 A317064

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jul 20 2018

STATUS

approved

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Last modified June 16 21:20 EDT 2019. Contains 324155 sequences. (Running on oeis4.)