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URL: https://oeis.org/A298314

⇱ A298314 - OEIS

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A298314
Number of n X n 0..1 arrays with every element equal to 0, 1, 3, 4 or 6 king-move adjacent elements, with upper left element zero.
0
1, 4, 3, 63, 507, 2466, 111137, 5833295, 281897638, 75712523939
OFFSET
1,2
COMMENTS
Diagonal of A298320.
EXAMPLE
Some solutions for n=7
..0..1..0..1..0..1..0. .0..1..0..1..1..1..0. .0..1..0..0..1..0..0
..1..0..0..0..0..0..1. .1..1..1..0..1..1..0. .1..0..0..0..1..0..0
..1..1..0..1..0..1..1. .1..0..0..0..0..0..0. .0..0..0..1..1..0..1
..1..0..0..0..0..0..1. .1..1..1..0..1..1..0. .0..1..0..0..1..0..1
..1..0..0..0..1..1..0. .1..1..1..0..1..1..0. .0..1..0..1..1..0..0
..1..1..0..1..0..1..1. .1..0..0..1..0..0..0. .1..1..0..0..1..0..1
..0..1..1..1..1..1..1. .0..1..0..0..1..0..1. .1..1..0..0..1..0..1
CROSSREFS
Cf. A298320.
Sequence in context: A328193 A273878 A013335 * A299389 A220556 A371687
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jan 17 2018
STATUS
approved