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A299175 Number of n X n 0..1 arrays with every element equal to 0, 1, 2, 3, 6 or 7 king-move adjacent elements, with upper left element zero. 0
1, 8, 70, 649, 8368, 123258, 2207509, 56481101, 2090883077, 106695657776, 7917434629718 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Diagonal of A299180.

LINKS

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

EXAMPLE

Some solutions for n=5

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

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

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

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

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

CROSSREFS

Cf. A299180.

Sequence in context: A266361 A298281 A299355 * A299938 A152263 A142986

Adjacent sequences:  A299172 A299173 A299174 * A299176 A299177 A299178

KEYWORD

nonn

AUTHOR

R. H. Hardin, Feb 04 2018

STATUS

approved

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Last modified September 27 06:22 EDT 2022. Contains 357052 sequences. (Running on oeis4.)