A305176 - OEIS

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A305176

Number of n X n 0..1 arrays with every element unequal to 1, 2, 5, 6 or 7 king-move adjacent elements, with upper left element zero.

0, 3, 8, 10, 64, 473, 1750, 24506, 370094, 4653537, 164815846, 6321406578

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,2

COMMENTS

Diagonal of A305182.

LINKS

Table of n, a(n) for n=1..12.

EXAMPLE

Some solutions for n=5

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

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

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

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

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

CROSSREFS

Cf. A305182.

Sequence in context: A032914 A088072 A213033 * A046545 A279585 A372630

Adjacent sequences: A305173 A305174 A305175 * A305177 A305178 A305179

KEYWORD

nonn

AUTHOR

R. H. Hardin, May 26 2018

STATUS

approved