A300036 - OEIS

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A300036

Number of n X n 0..1 arrays with every element equal to 1, 2, 3, 4, 6, 7 or 8 king-move adjacent elements, with upper left element zero.

0, 4, 113, 5663, 766231, 281861630, 262361247480, 630608329894023, 3923995292582316404

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

OFFSET

1,2

COMMENTS

Diagonal of A300040.

LINKS

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

EXAMPLE

Some solutions for n=5

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

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

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

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

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

CROSSREFS

Cf. A300040.

Sequence in context: A298331 A299394 A299222 * A199834 A194495 A260575

Adjacent sequences: A300033 A300034 A300035 * A300037 A300038 A300039

KEYWORD

nonn

AUTHOR

R. H. Hardin, Feb 23 2018

STATUS

approved