A305246 - OEIS

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A305246

Number of n X n 0..1 arrays with every element unequal to 0, 1, 3, 4 or 8 king-move adjacent elements, with upper left element zero.

1, 5, 10, 42, 203, 1149, 9288, 110121, 1688401, 35605490, 1011275830, 38884339685

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

OFFSET

1,2

COMMENTS

Diagonal of A305252.

LINKS

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

EXAMPLE

Some solutions for n=5

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

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

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

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

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

CROSSREFS

Cf. A305252.

Sequence in context: A271150 A271202 A186031 * A316546 A187877 A328605

Adjacent sequences: A305243 A305244 A305245 * A305247 A305248 A305249

KEYWORD

nonn

AUTHOR

R. H. Hardin, May 28 2018

STATUS

approved