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A278286
Number of 7Xn 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, 476, 30370, 2293193, 180592726, 14526103064, 1158266740087, 92512375832471, 7385561338360758, 589775066919535309, 47090974186795340550, 3760172975855159952403, 300241490821466632869029
OFFSET
1,2
COMMENTS
Row 7 of A278280.
LINKS
EXAMPLE
Some solutions for n=3
..0..1..0. .0..0..1. .0..0..1. .0..1..0. .0..0..0. .0..1..0. .0..1..1
..0..1..0. .1..1..1. .1..0..1. .0..1..0. .1..1..1. .0..1..0. .0..0..0
..1..1..0. .1..0..1. .1..1..1. .1..1..0. .0..1..1. .0..1..0. .0..1..1
..1..0..0. .1..0..1. .0..0..0. .1..1..0. .0..0..0. .1..1..0. .1..1..0
..0..1..0. .1..1..1. .0..1..1. .0..0..1. .1..1..1. .1..0..1. .1..0..0
..0..1..1. .1..1..1. .0..0..0. .1..1..1. .0..0..0. .1..1..0. .1..1..0
..1..0..1. .0..0..0. .0..1..1. .0..0..1. .0..1..1. .0..0..1. .1..0..1
CROSSREFS
Cf. A278280.
Sequence in context: A235656 A264290 A181228 * A216141 A325822 A224453
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 16 2016
STATUS
approved