A298233 - OEIS

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A298233

Number of n X n 0..1 arrays with every element equal to 0, 2, 3, 4 or 5 king-move adjacent elements, with upper left element zero.

1, 5, 22, 1156, 107163, 45356726, 67668568376, 329969482748272, 5435912602052623963

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

OFFSET

1,2

COMMENTS

Diagonal of A298240.

LINKS

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

EXAMPLE

Some solutions for n=5

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

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

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

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

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

CROSSREFS

Cf. A298240.

Sequence in context: A300031 A271678 A002069 * A215742 A357948 A367721

Adjacent sequences: A298230 A298231 A298232 * A298234 A298235 A298236

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jan 15 2018

STATUS

approved