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A300202 Number of n X n 0..1 arrays with every element equal to 0, 1, 2, 3, 4, 5, 6 or 8 king-move adjacent elements, with upper left element zero. 0
1, 8, 248, 29561, 13548425, 23883950854, 161892308617170, 4219465347519739696, 422854606293602673217071, 162939915121835846953153617510 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Diagonal of A300208.

LINKS

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

EXAMPLE

Some solutions for n=5

..0..0..0..0..0. .0..0..0..0..0. .0..0..0..0..0. .0..0..0..0..0

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

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

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

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

CROSSREFS

Cf. A300208.

Sequence in context: A035036 A221518 A317519 * A138323 A214817 A303415

Adjacent sequences:  A300199 A300200 A300201 * A300203 A300204 A300205

KEYWORD

nonn

AUTHOR

R. H. Hardin, Feb 28 2018

STATUS

approved

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Last modified September 26 09:15 EDT 2021. Contains 347664 sequences. (Running on oeis4.)