A318551 - OEIS

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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.

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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