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A302640
Number of 7Xn 0..1 arrays with every element equal to 0, 1, 3 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.
1
64, 86, 189, 657, 2303, 8981, 30216, 112431, 408512, 1512824, 5441957, 20021696, 73157743, 268090840, 977883198, 3582780118, 13103336584, 47949599697, 175342870194, 641714970276, 2347546538523, 8589020632731, 31421666502319
OFFSET
1,1
COMMENTS
Row 7 of A302635.
LINKS
EXAMPLE
Some solutions for n=5
..0..1..1..0..1. .0..1..0..1..0. .0..0..1..0..1. .0..1..1..0..1
..1..0..1..0..0. .0..0..0..1..1. .0..1..0..0..1. .1..0..1..0..1
..1..0..1..0..1. .0..1..0..1..0. .0..1..0..1..0. .1..0..1..0..1
..0..0..1..0..1. .0..1..0..1..0. .1..1..0..1..0. .0..0..1..0..1
..0..0..0..0..1. .1..1..0..0..0. .0..1..0..1..0. .1..0..1..0..1
..1..0..1..0..1. .0..1..0..1..0. .0..1..0..1..0. .1..1..1..0..0
..0..1..1..0..1. .0..1..0..1..0. .0..0..1..1..0. .1..0..1..0..1
CROSSREFS
Cf. A302635.
Sequence in context: A008435 A223083 A302169 * A302432 A303202 A302315
KEYWORD
nonn
AUTHOR
R. H. Hardin, Apr 10 2018
STATUS
approved