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A304051 Number of n X n 0..1 arrays with every element unequal to 1, 2, 4 or 5 king-move adjacent elements, with upper left element zero. 0
0, 3, 6, 26, 596, 3434, 77360, 4890117, 181435839, 30401698932 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Diagonal of A304058.

LINKS

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

EXAMPLE

Some solutions for n=5

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

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

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

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

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

CROSSREFS

Cf. A304058.

Sequence in context: A214309 A005646 A033194 * A128437 A200654 A208665

Adjacent sequences:  A304048 A304049 A304050 * A304052 A304053 A304054

KEYWORD

nonn

AUTHOR

R. H. Hardin, May 05 2018

STATUS

approved

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Last modified December 4 12:45 EST 2020. Contains 338923 sequences. (Running on oeis4.)