The On-Line Encyclopedia of Integer Sequences (OEIS)

A306167 revision #4

A306167

Number of nXn 0..1 arrays with every element unequal to 0, 1, 3, 5, 6 or 7 king-move adjacent elements, with upper left element zero.

1, 5, 13, 93, 832, 5277, 53834, 722779, 11592019, 300465411, 11442115258

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OFFSET

1,2

COMMENTS

Diagonal of A306172.

LINKS

EXAMPLE

Some solutions for n=5

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

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

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

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

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

CROSSREFS

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jun 23 2018

STATUS

approved