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A299181 Number of n X n 0..1 arrays with every element equal to 0, 1, 2, 4, 6 or 7 king-move adjacent elements, with upper left element zero. 0
1, 7, 20, 75, 626, 3773, 59287, 1666826, 51863841, 3412264531 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Diagonal of A299187.

LINKS

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

EXAMPLE

Some solutions for n=5

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

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

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

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

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

CROSSREFS

Cf. A299187.

Sequence in context: A222549 A196584 A301777 * A299944 A265657 A298214

Adjacent sequences:  A299178 A299179 A299180 * A299182 A299183 A299184

KEYWORD

nonn

AUTHOR

R. H. Hardin, Feb 04 2018

STATUS

approved

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Last modified September 18 19:30 EDT 2021. Contains 347534 sequences. (Running on oeis4.)