A304675 Number of nX7 0..1 arrays with every element unequal to 0, 2, 3, 5 or 6 king-move adjacent elements, with upper left element zero.

1, 99, 337, 1950, 15544, 122388, 930123, 7208807, 57718628, 454436233, 3581807203, 28420290247, 224930626941, 1779684725816, 14093442393516, 111612618187501, 883726663910560, 6997730121295655, 55415998410956365, 438827776201228283

Offset

1,2

Comments

Column 7 of A304676.

Links

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

Example

Some solutions for n=5
..0..0..0..0..0..0..1. .0..1..1..1..1..1..0. .0..0..0..0..1..1..0
..1..1..1..0..1..1..0. .1..1..0..0..0..0..1. .1..1..0..1..0..1..0
..1..1..1..0..0..1..0. .0..0..0..1..1..0..1. .1..0..0..1..0..0..0
..0..0..1..1..0..1..0. .0..0..1..0..0..1..1. .0..1..1..0..1..1..0
..1..0..0..0..1..1..0. .0..0..1..1..1..1..0. .0..1..0..0..0..1..0

Crossrefs

Cf. A304676.

Sequence in context: A008882 A156757 A027579 * A316122 A157659 A273187

Adjacent sequences: A304672 A304673 A304674 * A304676 A304677 A304678

Keyword

nonn

Author

R. H. Hardin, May 16 2018

Status

approved