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A299122 Number of n X n 0..1 arrays with every element equal to 0, 1, 3, 4, 5 or 7 king-move adjacent elements, with upper left element zero. 0
1, 4, 9, 232, 2636, 198753, 50126162, 17703574257, 28274774976231 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Diagonal of A299128.

LINKS

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

EXAMPLE

Some solutions for n=5

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

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

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

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

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

CROSSREFS

Cf. A299128.

Sequence in context: A318615 A030074 A335723 * A167657 A175700 A035126

Adjacent sequences:  A299119 A299120 A299121 * A299123 A299124 A299125

KEYWORD

nonn

AUTHOR

R. H. Hardin, Feb 03 2018

STATUS

approved

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Last modified May 26 20:51 EDT 2022. Contains 354092 sequences. (Running on oeis4.)