A298548 - OEIS

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A298548

Number of n X n 0..1 arrays with every element equal to 0, 2, 3, 5 or 7 king-move adjacent elements, with upper left element zero.

1, 5, 4, 33, 341, 4157, 85227, 2586208, 113602418, 7377197638

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

OFFSET

1,2

COMMENTS

Diagonal of A298554.

LINKS

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

EXAMPLE

Some solutions for n=7

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

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

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

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

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

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

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

CROSSREFS

Cf. A298554.

Sequence in context: A237648 A091001 A297936 * A078811 A093399 A123233

Adjacent sequences: A298545 A298546 A298547 * A298549 A298550 A298551

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jan 21 2018

STATUS

approved