A298147 - OEIS

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A298147

Number of n X n 0..1 arrays with every element equal to 0, 1, 3, 4, 5 or 8 king-move adjacent elements, with upper left element zero.

1, 4, 6, 196, 1822, 111350, 25625864, 7382868491, 11381281119654

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

OFFSET

1,2

COMMENTS

Diagonal of A298154.

LINKS

Table of n, a(n) for n=1..9.

EXAMPLE

Some solutions for n=6

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

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

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

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

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

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

CROSSREFS

Cf. A298154.

Sequence in context: A074124 A303161 A070156 * A081970 A076098 A377392

Adjacent sequences: A298144 A298145 A298146 * A298148 A298149 A298150

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jan 13 2018

STATUS

approved