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A300202
Number of n X n 0..1 arrays with every element equal to 0, 1, 2, 3, 4, 5, 6 or 8 king-move adjacent elements, with upper left element zero.
0
1, 8, 248, 29561, 13548425, 23883950854, 161892308617170, 4219465347519739696, 422854606293602673217071, 162939915121835846953153617510
OFFSET
1,2
COMMENTS
Diagonal of A300208.
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..0. .0..0..1..0..1. .0..0..1..0..0. .0..0..0..0..1
..1..0..1..0..1. .0..0..1..1..0. .1..0..0..1..1. .0..1..1..0..1
..1..1..1..1..0. .0..1..0..1..1. .0..1..1..1..1. .1..0..0..0..1
..0..1..0..1..0. .1..1..1..1..1. .0..0..0..0..1. .0..1..0..1..1
CROSSREFS
Cf. A300208.
Sequence in context: A035036 A221518 A317519 * A347107 A138323 A214817
KEYWORD
nonn
AUTHOR
R. H. Hardin, Feb 28 2018
STATUS
approved