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A299603 Number of nXn 0..1 arrays with every element equal to 1, 2, 3, 6, 7 or 8 king-move adjacent elements, with upper left element zero. 0
0, 4, 48, 466, 5125, 75970, 1284100, 30465069, 1069988410, 50612692651, 3442371498953 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Diagonal of A299607.

LINKS

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

EXAMPLE

Some solutions for n=6

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

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

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

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

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

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

CROSSREFS

Cf. A299607.

Sequence in context: A297987 A298842 A298649 * A026942 A264727 A283049

Adjacent sequences:  A299600 A299601 A299602 * A299604 A299605 A299606

KEYWORD

nonn

AUTHOR

R. H. Hardin, Feb 14 2018

STATUS

approved

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Last modified February 21 02:02 EST 2020. Contains 332086 sequences. (Running on oeis4.)