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A298184
Number of n X n 0..1 arrays with every element equal to 3, 5, 7 or 8 king-move adjacent elements, with upper left element zero.
0
0, 1, 1, 3, 5, 10, 19, 41, 81, 196, 474, 1315, 3871, 15716, 68291, 339947, 1851904, 11717321, 86766476
OFFSET
1,4
COMMENTS
Diagonal of A298187.
EXAMPLE
Some solutions for n=7
..0..0..0..1..1..1..1. .0..0..0..0..0..0..0. .0..0..0..1..1..0..0
..0..0..0..1..1..1..1. .0..0..0..0..0..0..0. .0..0..0..1..1..0..0
..0..0..0..1..1..1..1. .0..0..0..0..0..0..0. .0..0..0..1..1..0..0
..0..0..0..1..1..1..1. .0..0..0..0..0..0..0. .0..0..0..1..1..0..0
..0..0..0..1..1..1..1. .0..0..0..0..0..0..0. .0..0..0..1..1..0..0
..0..0..0..1..1..1..1. .1..1..1..1..1..1..1. .0..0..0..1..1..0..0
..0..0..0..1..1..1..1. .1..1..1..1..1..1..1. .0..0..0..1..1..0..0
CROSSREFS
Cf. A298187.
Sequence in context: A317766 A217925 A018101 * A182536 A158568 A068013
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jan 14 2018
STATUS
approved