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A318551 Number of nX7 0..1 arrays with every element unequal to 1, 2, 4 or 6 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero. 1
8, 102, 258, 1782, 12073, 67976, 437825, 2689769, 16069287, 100151409, 617826286, 3829474681, 23768872002, 147448159384, 915439292568, 5684596730219, 35296722920895, 219214357674061, 1361365706626785, 8454876230184285 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 7 of A318552.

LINKS

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

EXAMPLE

Some solutions for n=5

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

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

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

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

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

CROSSREFS

Cf. A318552.

Sequence in context: A199816 A302870 A317862 * A307461 A318213 A001575

Adjacent sequences:  A318548 A318549 A318550 * A318552 A318553 A318554

KEYWORD

nonn

AUTHOR

R. H. Hardin, Aug 28 2018

STATUS

approved

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Last modified August 7 23:16 EDT 2022. Contains 355995 sequences. (Running on oeis4.)