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A300109 Number of n X n 0..1 arrays with every element equal to 1, 2, 4, 5, 6, 7 or 8 king-move adjacent elements, with upper left element zero. 0
0, 3, 15, 112, 3776, 346593, 87633085, 55075362479, 98018916520293 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Diagonal of A300115.

LINKS

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

EXAMPLE

Some solutions for n=5

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

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

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

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

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

CROSSREFS

Cf. A300115.

Sequence in context: A298390 A299508 A299308 * A056053 A295758 A343707

Adjacent sequences:  A300106 A300107 A300108 * A300110 A300111 A300112

KEYWORD

nonn

AUTHOR

R. H. Hardin, Feb 25 2018

STATUS

approved

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Last modified September 27 03:24 EDT 2022. Contains 357051 sequences. (Running on oeis4.)