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A299515 Number of n X n 0..1 arrays with every element equal to 0, 3, 4, 5, 6 or 8 king-move adjacent elements, with upper left element zero. 0
1, 1, 12, 8, 285, 12411, 902141, 310347496, 249358437986, 595135127486520 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

COMMENTS

Diagonal of A299521.

LINKS

Table of n, a(n) for n=1..10.

EXAMPLE

Some solutions for n=5

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

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

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

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

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

CROSSREFS

Cf. A299521.

Sequence in context: A338809 A038334 A101501 * A326927 A338289 A018870

Adjacent sequences: A299512 A299513 A299514 * A299516 A299517 A299518

KEYWORD

nonn

AUTHOR

R. H. Hardin, Feb 11 2018

STATUS

approved

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Last modified January 31 15:11 EST 2023. Contains 359976 sequences. (Running on oeis4.)