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A302386
Number of 7Xn 0..1 arrays with every element equal to 1, 2, 3 or 4 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.
1
0, 1172, 97160, 5421003, 404225195, 29810775827, 2195619257236, 161767569162389, 11926561967149057, 879261959837334277, 64822173992483793756, 4778918571861830147396, 352319630303338775663571
OFFSET
1,2
COMMENTS
Row 7 of A302381.
LINKS
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..0..1..0. .0..0..0..1..0. .0..0..0..1..0. .0..0..0..1..0
..1..0..1..1..1. .1..0..1..1..0. .1..0..1..1..0. .1..0..1..1..0
..0..1..1..0..1. .1..1..0..0..1. .0..1..1..0..0. .0..1..0..0..1
..1..0..0..0..1. .0..0..1..0..1. .0..1..1..1..0. .1..0..0..0..0
..0..0..1..1..0. .0..0..1..1..0. .1..0..0..1..0. .0..1..1..0..0
..0..0..1..0..1. .0..1..0..0..1. .0..0..0..0..1. .0..0..0..1..1
CROSSREFS
Cf. A302381.
Sequence in context: A302477 A303258 A230738 * A303107 A302958 A232082
KEYWORD
nonn
AUTHOR
R. H. Hardin, Apr 06 2018
STATUS
approved