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A304668 Number of nX7 0..1 arrays with every element unequal to 0, 1, 3, 5 or 6 king-move adjacent elements, with upper left element zero. 1
21, 237, 252, 1366, 5311, 15421, 49516, 163216, 516865, 1750074, 5929076, 19375640, 64686597, 216477114, 712798687, 2370003650, 7909241173, 26191198822, 87032751877, 289870295197, 961813760494, 3195386304270, 10630986578476 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Column 7 of A304669.
LINKS
EXAMPLE
Some solutions for n=5
..0..1..1..1..1..1..1. .0..1..1..1..1..0..0. .0..1..1..0..1..0..0
..0..0..1..1..1..1..0. .1..1..1..1..1..1..0. .1..1..1..1..1..0..1
..1..1..1..1..1..0..0. .1..1..1..1..1..1..1. .1..1..1..1..1..1..1
..0..1..1..1..0..0..0. .1..1..0..1..1..0..0. .0..1..1..1..1..1..1
..1..1..1..0..0..0..0. .0..1..0..0..1..0..1. .1..1..1..1..1..1..1
CROSSREFS
Cf. A304669.
Sequence in context: A304930 A305346 A316614 * A306171 A316426 A317428
KEYWORD
nonn
AUTHOR
R. H. Hardin, May 16 2018
STATUS
approved

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Last modified June 20 15:55 EDT 2024. Contains 373526 sequences. (Running on oeis4.)