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A299188 Number of n X n 0..1 arrays with every element equal to 0, 1, 3, 4, 6 or 7 king-move adjacent elements, with upper left element zero. 0
1, 4, 3, 80, 1539, 11459, 848789, 122310309, 6602925250, 2215354712154 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Diagonal of A299194.

LINKS

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

EXAMPLE

Some solutions for n=5

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

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

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

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

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

CROSSREFS

Cf. A299194.

Sequence in context: A298314 A299389 A220556 * A300026 A266255 A325871

Adjacent sequences:  A299185 A299186 A299187 * A299189 A299190 A299191

KEYWORD

nonn

AUTHOR

R. H. Hardin, Feb 04 2018

STATUS

approved

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Last modified December 3 20:35 EST 2020. Contains 338920 sequences. (Running on oeis4.)