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A299931 Number of n X n 0..1 arrays with every element equal to 1, 2, 3, 4, 5, 7 or 8 king-move adjacent elements, with upper left element zero. 0
0, 4, 130, 11212, 3441754, 3664429516, 13409569414628, 169221841691644190, 7363533504405087088605 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Diagonal of A299937.

LINKS

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

EXAMPLE

Some solutions for n=5

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

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

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

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

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

CROSSREFS

Cf. A299937.

Sequence in context: A050284 A096759 A299367 * A006103 A209012 A003371

Adjacent sequences:  A299928 A299929 A299930 * A299932 A299933 A299934

KEYWORD

nonn

AUTHOR

R. H. Hardin, Feb 22 2018

STATUS

approved

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Last modified September 30 20:19 EDT 2020. Contains 337440 sequences. (Running on oeis4.)