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A278279
Number of nX7 0..1 arrays with every element both equal and not equal to some elements at offset (-1,-1) (-1,0) (-1,1) (0,-1) (0,1) or (1,0), with upper left element zero.
1
0, 317, 20736, 1870365, 157609938, 13538466880, 1158266740087, 99182079495633, 8491049196878995, 726961954823301592, 62238120572972036597, 5328470518831632979210, 456192709882426407920004
OFFSET
1,2
COMMENTS
Column 7 of A278280.
LINKS
EXAMPLE
Some solutions for n=3
..0..0..0..1..1..0..0. .0..1..1..1..0..1..0. .0..1..1..1..0..1..1
..1..1..0..1..0..0..1. .0..1..0..1..0..1..0. .0..1..0..0..0..1..0
..1..0..1..0..0..1..1. .0..1..0..1..1..1..0. .0..1..0..1..1..0..0
CROSSREFS
Cf. A278280.
Sequence in context: A243958 A273804 A142130 * A058002 A252246 A252254
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 16 2016
STATUS
approved