A305510 - OEIS

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A305510

Number of nXn 0..1 arrays with every element unequal to 1, 2, 5, 6 or 8 king-move adjacent elements, with upper left element zero.

0, 3, 5, 10, 62, 343, 3547, 61412, 923608, 35152678, 1244230912, 61874796253, 5719344291435

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,2

COMMENTS

Diagonal of A305516.

LINKS

Table of n, a(n) for n=1..13.

EXAMPLE

Some solutions for n=5

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

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

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

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

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

CROSSREFS

Cf. A305516.

Sequence in context: A060955 A358899 A317338 * A024329 A354517 A354389

Adjacent sequences: A305507 A305508 A305509 * A305511 A305512 A305513

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jun 03 2018

STATUS

approved