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A303886
Number of nX6 0..1 arrays with every element unequal to 0, 2, 3 or 4 king-move adjacent elements, with upper left element zero.
1
1, 272, 256, 2130, 4964, 24985, 88901, 384168, 1517262, 6387363, 26128622, 109286469, 453167087, 1893484140, 7895422217, 33012465799, 138034364553, 577776514184, 2419883706139, 10139777334645, 42517613567822
OFFSET
1,2
COMMENTS
Column 6 of A303888.
LINKS
EXAMPLE
Some solutions for n=5
..0..1..1..0..0..1. .0..1..1..1..0..0. .0..1..1..0..0..1. .0..1..0..1..0..0
..0..1..1..0..0..1. .1..0..0..0..1..1. .0..1..1..0..0..1. .1..0..0..0..1..1
..0..1..1..0..0..1. .1..0..0..0..1..1. .0..1..1..0..0..0. .1..0..0..1..1..0
..1..1..1..0..0..0. .0..1..1..1..0..0. .0..1..1..0..0..1. .0..1..1..1..1..0
..0..0..0..1..1..1. .0..1..1..1..0..0. .1..0..1..0..0..1. .1..0..1..0..0..1
CROSSREFS
Cf. A303888.
Sequence in context: A287232 A332978 A214012 * A305279 A005933 A112820
KEYWORD
nonn
AUTHOR
R. H. Hardin, May 02 2018
STATUS
approved