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A300083 Number of n X n 0..1 arrays with every element equal to 0, 1, 3, 5, 6, 7 or 8 king-move adjacent elements, with upper left element zero. 0
1, 4, 1, 25, 415, 1822, 167131, 14634300, 1518807971, 1088211703169 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Diagonal of A300089.

LINKS

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

EXAMPLE

Some solutions for n=5

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

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

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

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

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

CROSSREFS

Cf. A300089.

Sequence in context: A285066 A046860 A089505 * A062328 A263918 A136234

Adjacent sequences:  A300080 A300081 A300082 * A300084 A300085 A300086

KEYWORD

nonn

AUTHOR

R. H. Hardin, Feb 24 2018

STATUS

approved

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Last modified May 18 09:26 EDT 2021. Contains 343995 sequences. (Running on oeis4.)