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A304051 Number of n X n 0..1 arrays with every element unequal to 1, 2, 4 or 5 king-move adjacent elements, with upper left element zero. 0
0, 3, 6, 26, 596, 3434, 77360, 4890117, 181435839, 30401698932 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
COMMENTS
Diagonal of A304058.
LINKS
EXAMPLE
Some solutions for n=5
..0..1..0..0..1. .0..1..1..0..1. .0..1..0..1..1. .0..0..0..1..0
..1..0..0..1..0. .0..1..1..1..1. .0..0..1..1..0. .1..0..1..0..0
..1..1..0..1..1. .0..0..1..1..0. .0..1..1..1..1. .0..1..1..1..0
..1..1..0..1..1. .1..0..1..1..0. .0..0..1..1..0. .0..0..1..0..1
..0..0..0..0..0. .0..1..1..1..1. .0..1..0..1..1. .0..1..0..0..0
CROSSREFS
Cf. A304058.
Sequence in context: A214309 A005646 A033194 * A128437 A200654 A208665
KEYWORD
nonn
AUTHOR
R. H. Hardin, May 05 2018
STATUS
approved

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Last modified March 28 18:04 EDT 2024. Contains 371254 sequences. (Running on oeis4.)