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A299445 Number of n X n 0..1 arrays with every element equal to 0, 1, 3, 5, 6 or 8 king-move adjacent elements, with upper left element zero. 0
1, 4, 1, 21, 231, 211, 6326, 174794, 665961, 84553473, 4512663317 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Diagonal of A299451.

LINKS

Table of n, a(n) for n=1..11.

EXAMPLE

Some solutions for n=5

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

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

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

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

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

CROSSREFS

Cf. A299451.

Sequence in context: A159841 A202550 A142472 * A135049 A113384 A243663

Adjacent sequences:  A299442 A299443 A299444 * A299446 A299447 A299448

KEYWORD

nonn

AUTHOR

R. H. Hardin, Feb 10 2018

STATUS

approved

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Last modified July 5 20:21 EDT 2020. Contains 335473 sequences. (Running on oeis4.)