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A306171 Number of nX7 0..1 arrays with every element unequal to 0, 1, 3, 5, 6 or 7 king-move adjacent elements, with upper left element zero. 1
21, 237, 252, 1372, 5421, 16195, 53834, 185090, 619073, 2213741, 7903854, 27396112, 97000671, 345456070, 1212355115, 4294891431, 15302228975, 54122847981, 192114679415, 684540291374, 2430461260505, 8640825474293, 30793872853587 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 7 of A306172.

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..210

EXAMPLE

Some solutions for n=5

..0..1..1..1..1..1..1. .0..0..0..1..0..0..0. .0..0..0..0..1..0..0

..1..1..1..1..1..1..0. .0..0..0..0..0..0..1. .0..0..0..0..0..0..0

..0..0..1..1..1..0..0. .0..0..0..0..0..0..0. .0..0..0..0..0..0..0

..0..1..1..1..1..1..1. .1..0..0..0..0..0..0. .0..0..0..0..0..0..0

..1..1..1..1..1..1..0. .1..1..0..0..0..0..1. .0..0..0..1..0..0..0

CROSSREFS

Cf. A306172.

Sequence in context: A305346 A316614 A304668 * A316426 A317428 A089937

Adjacent sequences:  A306168 A306169 A306170 * A306172 A306173 A306174

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jun 23 2018

STATUS

approved

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Last modified January 25 12:30 EST 2022. Contains 350572 sequences. (Running on oeis4.)