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A305524
Number of nXn 0..1 arrays with every element unequal to 0, 1, 2, 3, 4 or 6 king-move adjacent elements, with upper left element zero.
0
1, 8, 161, 7385, 767417, 180860170, 98651246976, 122959485595061, 349219952815780064
OFFSET
1,2
COMMENTS
Diagonal of A305530.
EXAMPLE
Some solutions for n=5
..0..0..0..0..1. .0..0..0..0..0. .0..0..0..0..0. .0..0..0..0..1
..0..0..1..0..1. .1..1..0..0..1. .0..0..0..0..0. .0..0..0..0..0
..1..1..1..0..0. .1..1..1..0..1. .1..0..0..1..0. .1..0..0..0..1
..1..1..1..0..0. .0..1..1..0..0. .1..1..1..1..0. .1..0..0..0..1
..0..0..1..1..0. .1..0..1..1..1. .0..0..1..1..1. .1..0..0..1..0
CROSSREFS
Cf. A305530.
Sequence in context: A064755 A140337 A245322 * A326099 A171461 A065116
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jun 04 2018
STATUS
approved