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A305341 Number of n X n 0..1 arrays with every element unequal to 0, 1, 3, 5 or 8 king-move adjacent elements, with upper left element zero. 0
1, 5, 14, 77, 649, 5408, 64658, 1241359, 29268593, 960816363, 47443906836, 3123256208489, 282016871368240, 36794768206114222 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
COMMENTS
Diagonal of A305347.
LINKS
EXAMPLE
Some solutions for n=5
..0..1..0..0..0. .0..0..0..0..0. .0..1..1..1..1. .0..0..0..0..0
..0..0..0..0..0. .1..0..0..1..0. .1..1..1..1..1. .1..0..0..1..0
..0..0..0..0..0. .0..0..0..0..0. .1..1..1..1..1. .0..0..0..0..0
..1..0..0..0..1. .0..0..0..0..0. .1..1..1..1..1. .0..0..0..0..0
..0..0..0..1..1. .1..0..0..0..1. .0..1..1..1..0. .0..0..0..1..0
CROSSREFS
Cf. A305347.
Sequence in context: A305017 A007838 A306751 * A316611 A174939 A320800
KEYWORD
nonn
AUTHOR
R. H. Hardin, May 30 2018
STATUS
approved

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Last modified July 15 07:59 EDT 2024. Contains 374324 sequences. (Running on oeis4.)