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A298094
Number of n X n 0..1 arrays with every element equal to 3, 4, 5 or 6 king-move adjacent elements, with upper left element zero.
0
0, 1, 0, 3, 5, 847, 16212, 6915147, 2015018055, 4040561643423
OFFSET
1,4
COMMENTS
Diagonal of A298100.
EXAMPLE
Some solutions for n=7
..0..0..0..1..1..0..0. .0..0..0..1..1..0..0. .0..0..1..1..1..0..0
..0..0..0..1..1..0..0. .0..0..0..1..1..0..0. .0..0..1..1..1..0..0
..1..1..0..1..1..0..0. .1..1..0..0..0..0..0. .0..0..0..0..0..0..0
..1..1..0..0..1..1..1. .1..1..0..0..0..1..1. .0..0..1..0..0..1..1
..1..1..1..0..0..1..1. .1..1..1..1..1..1..1. .0..1..1..1..1..1..1
..0..0..1..1..1..0..0. .0..0..1..0..0..1..1. .0..0..1..1..0..0..0
..0..0..1..1..1..0..0. .0..0..0..0..0..1..1. .0..0..0..0..0..0..0
CROSSREFS
Cf. A298100.
Sequence in context: A350036 A136134 A119497 * A012783 A062655 A364547
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jan 12 2018
STATUS
approved