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A305917
Number of nX7 0..1 arrays with every element unequal to 0, 1, 3, 4, 5 or 7 king-move adjacent elements, with upper left element zero.
1
21, 289, 312, 4982, 57465, 811996, 18643274, 371733699, 6830409319, 143897189930, 2971442216847, 59080121487287, 1211031708383269, 24872652363493440, 504919099584347536, 10304854339183282114, 210797145712163688250
OFFSET
1,1
COMMENTS
Column 7 of A305918.
LINKS
EXAMPLE
Some solutions for n=5
..0..0..1..0..1..0..1. .0..0..1..1..0..1..0. .0..1..1..0..0..1..1
..0..0..0..1..0..1..1. .0..0..0..1..0..1..1. .0..0..1..0..1..1..1
..0..0..0..1..1..0..0. .1..0..1..0..1..0..0. .1..1..0..0..0..1..0
..0..0..1..1..0..1..0. .1..1..1..0..1..0..1. .1..0..1..0..0..1..1
..1..0..1..0..0..1..1. .1..1..1..1..1..0..0. .1..1..1..0..1..1..1
CROSSREFS
Cf. A305918.
Sequence in context: A346844 A188710 A304354 * A316238 A317159 A305648
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jun 14 2018
STATUS
approved