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A299596 Number of n X n 0..1 arrays with every element equal to 2, 3, 4, 5, 7 or 8 king-move adjacent elements, with upper left element zero. 0
0, 1, 9, 130, 21367, 7242300, 9743385598, 43313516068423, 635719287829223338 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

COMMENTS

Diagonal of A299602.

LINKS

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

EXAMPLE

Some solutions for n=5

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

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

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

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

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

CROSSREFS

Cf. A299602.

Sequence in context: A349155 A328270 A060944 * A200407 A194895 A112123

Adjacent sequences:  A299593 A299594 A299595 * A299597 A299598 A299599

KEYWORD

nonn

AUTHOR

R. H. Hardin, Feb 14 2018

STATUS

approved

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Last modified May 28 09:09 EDT 2022. Contains 354112 sequences. (Running on oeis4.)