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A305517 Number of nXn 0..1 arrays with every element unequal to 0, 1, 2, 3, 4 or 5 king-move adjacent elements, with upper left element zero. 0
1, 8, 219, 16480, 3536750, 2122076804, 3592436519091, 17139689875149747, 230276333011388246524 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
COMMENTS
Diagonal of A305523.
LINKS
EXAMPLE
Some solutions for n=5
..0..0..0..0..0. .0..0..0..0..0. .0..0..0..0..0. .0..0..0..0..0
..0..0..1..0..1. .0..0..1..0..1. .0..0..1..1..1. .0..1..1..1..1
..0..1..1..1..1. .0..1..1..1..0. .1..1..1..1..1. .1..1..1..0..0
..1..1..1..1..1. .1..1..0..0..1. .1..1..1..0..0. .0..0..0..0..0
..1..0..0..1..0. .0..0..0..0..0. .0..1..0..0..0. .0..1..0..1..0
CROSSREFS
Cf. A305523.
Sequence in context: A329304 A352471 A232157 * A298964 A298455 A055350
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jun 04 2018
STATUS
approved

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Last modified July 14 13:51 EDT 2024. Contains 374318 sequences. (Running on oeis4.)