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A299389 Number of n X n 0..1 arrays with every element equal to 0, 1, 3, 4, 6 or 8 king-move adjacent elements, with upper left element zero. 0
1, 4, 3, 63, 508, 2483, 112188, 5884463, 286590596, 77024397318 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Diagonal of A299393.

LINKS

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

EXAMPLE

Some solutions for n=6

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

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

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

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

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

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

CROSSREFS

Cf. A299393.

Sequence in context: A273878 A013335 A298314 * A220556 A299188 A300026

Adjacent sequences:  A299386 A299387 A299388 * A299390 A299391 A299392

KEYWORD

nonn

AUTHOR

R. H. Hardin, Feb 09 2018

STATUS

approved

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Last modified December 2 23:09 EST 2020. Contains 338898 sequences. (Running on oeis4.)