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A299938 Number of n X n 0..1 arrays with every element equal to 0, 1, 2, 3, 6, 7 or 8 king-move adjacent elements, with upper left element zero. 0
1, 8, 70, 649, 8379, 124748, 2237911, 57942564, 2226744922, 121611666154, 12022143900385 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Diagonal of A299942.

LINKS

Table of n, a(n) for n=1..11.

EXAMPLE

Some solutions for n=5

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

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

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

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

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

CROSSREFS

Cf. A299942.

Sequence in context: A298281 A299355 A299175 * A152263 A142986 A123511

Adjacent sequences:  A299935 A299936 A299937 * A299939 A299940 A299941

KEYWORD

nonn

AUTHOR

R. H. Hardin, Feb 22 2018

STATUS

approved

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Last modified October 1 06:15 EDT 2022. Contains 357134 sequences. (Running on oeis4.)