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A304059 Number of n X n 0..1 arrays with every element unequal to 2, 3, 4 or 5 king-move adjacent elements, with upper left element zero. 0
0, 3, 14, 661, 79185, 25507453, 23106300531, 55351295222420, 362287570737702640 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Diagonal of A304065.

LINKS

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

EXAMPLE

Some solutions for n=5

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

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

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

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

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

CROSSREFS

Cf. A304065.

Sequence in context: A264748 A092987 A088334 * A305453 A305016 A316682

Adjacent sequences:  A304056 A304057 A304058 * A304060 A304061 A304062

KEYWORD

nonn

AUTHOR

R. H. Hardin, May 05 2018

STATUS

approved

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Last modified August 13 22:39 EDT 2022. Contains 356109 sequences. (Running on oeis4.)