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A298281 Number of n X n 0..1 arrays with every element equal to 0, 1, 2, 3 or 6 king-move adjacent elements, with upper left element zero. 0
1, 8, 70, 649, 8264, 121368, 2195114, 55665676, 2065512284, 105764508137, 7817598459732, 873942008386780, 140850901178992246 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Diagonal of A298287.

LINKS

Table of n, a(n) for n=1..13.

EXAMPLE

Some solutions for n=6

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

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

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

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

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

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

CROSSREFS

Cf. A298287.

Sequence in context: A056631 A190560 A266361 * A299355 A299175 A299938

Adjacent sequences:  A298278 A298279 A298280 * A298282 A298283 A298284

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jan 16 2018

STATUS

approved

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Last modified October 1 08:23 EDT 2022. Contains 357135 sequences. (Running on oeis4.)