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A305334 Number of nXn 0..1 arrays with every element unequal to 0, 1, 2, 5 or 8 king-move adjacent elements, with upper left element zero. 0
1, 4, 12, 81, 1185, 30826, 1321695, 98008416, 12373093291, 2656799749952, 971390294075369, 604435523445204922, 640013417117018100841, 1153330960736161428690488 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Diagonal of A305340.

LINKS

Table of n, a(n) for n=1..14.

EXAMPLE

Some solutions for n=5

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

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

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

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

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

CROSSREFS

Cf. A305340.

Sequence in context: A299795 A010370 A197852 * A205337 A263866 A208802

Adjacent sequences:  A305331 A305332 A305333 * A305335 A305336 A305337

KEYWORD

nonn

AUTHOR

R. H. Hardin, May 30 2018

STATUS

approved

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Last modified February 20 16:42 EST 2020. Contains 332080 sequences. (Running on oeis4.)