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A298901
Number of nX7 0..1 arrays with every element equal to 3, 4, 5, 6 or 8 king-move adjacent elements, with upper left element zero.
1
0, 8, 12, 56, 471, 4689, 44186, 522001, 5379458, 62969638, 689301117, 7995632432, 89669878606, 1030894396261, 11694235466700, 133810754113662, 1523947269885410, 17410346219635865, 198543925466100523
OFFSET
1,2
COMMENTS
Column 7 of A298902.
LINKS
EXAMPLE
Some solutions for n=5
..0..0..0..0..0..1..1. .0..0..1..1..0..0..0. .0..0..0..0..0..1..1
..0..0..1..0..0..1..1. .0..0..1..1..0..0..0. .0..0..0..0..0..1..1
..0..1..1..1..1..1..1. .0..0..1..0..0..0..0. .0..0..0..0..0..0..1
..0..0..1..1..1..0..0. .0..0..1..1..0..1..1. .1..1..1..1..0..1..1
..0..0..1..1..1..0..0. .0..0..1..1..1..1..1. .1..1..1..1..1..1..1
CROSSREFS
Cf. A298902.
Sequence in context: A022668 A286360 A212815 * A368125 A305236 A069186
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jan 28 2018
STATUS
approved