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A299833 Number of n X n 0..1 arrays with every element equal to 1, 2, 3, 4, 5, 6 or 8 king-move adjacent elements, with upper left element zero. 0
0, 4, 142, 13850, 5544044, 8606994457, 50892107038125, 1150505978004893314, 99505249795723847465007, 32917701191229121103342743309 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Diagonal of A299839.

LINKS

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

EXAMPLE

Some solutions for n=5

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

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

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

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

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

CROSSREFS

Cf. A299839.

Sequence in context: A210831 A247483 A293752 * A231949 A239248 A225133

Adjacent sequences: A299830 A299831 A299832 * A299834 A299835 A299836

KEYWORD

nonn

AUTHOR

R. H. Hardin, Feb 20 2018

STATUS

approved

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Last modified February 7 22:58 EST 2023. Contains 360132 sequences. (Running on oeis4.)