A300209 - OEIS

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A300209

Number of n X n 0..1 arrays with every element equal to 0, 1, 2, 3, 4, 5, 7 or 8 king-move adjacent elements, with upper left element zero.

1, 8, 228, 22194, 7452385, 8664017314, 34824178698922, 483558835111191345, 23194796188589638077072

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

OFFSET

1,2

COMMENTS

Diagonal of A300215.

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..0. .0..0..0..0..0. .0..0..0..0..0

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

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

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

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

CROSSREFS

Cf. A300215.

Sequence in context: A320365 A317559 A302735 * A300798 A240299 A222525

Adjacent sequences: A300206 A300207 A300208 * A300210 A300211 A300212

KEYWORD

nonn

AUTHOR

R. H. Hardin, Feb 28 2018

STATUS

approved