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A298233
Number of n X n 0..1 arrays with every element equal to 0, 2, 3, 4 or 5 king-move adjacent elements, with upper left element zero.
0
1, 5, 22, 1156, 107163, 45356726, 67668568376, 329969482748272, 5435912602052623963
OFFSET
1,2
COMMENTS
Diagonal of A298240.
EXAMPLE
Some solutions for n=5
..0..1..0..0..0. .0..0..0..1..1. .0..0..0..1..0. .0..1..0..0..0
..1..1..1..0..1. .1..0..1..0..1. .0..1..0..0..0. .1..1..1..0..0
..1..0..1..1..1. .1..1..0..1..0. .1..1..1..1..0. .0..0..1..1..1
..0..0..1..0..0. .0..0..0..0..1. .1..1..0..1..1. .0..1..0..0..1
..0..0..0..0..1. .0..1..0..1..1. .1..0..0..1..1. .1..1..1..0..0
CROSSREFS
Cf. A298240.
Sequence in context: A300031 A271678 A002069 * A215742 A357948 A367721
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jan 15 2018
STATUS
approved