A316426 Number of nX7 0..1 arrays with every element unequal to 0, 1, 3, 5, 6 or 8 king-move adjacent elements, with upper left element zero.

21, 237, 311, 1660, 8761, 31433, 130402, 585212, 2366785, 9815061, 42205654, 175355823, 730455300, 3093042582, 12946456110, 54109637656, 227779656571, 955289842419, 4000305391990, 16801782691536, 70493554918254

Offset

1,1

Comments

Column 7 of A316427.

Links

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

Example

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

Crossrefs

Cf. A316427.

Sequence in context: A316614 A304668 A306171 * A317428 A089937 A175843

Adjacent sequences: A316423 A316424 A316425 * A316427 A316428 A316429

Keyword

nonn

Author

R. H. Hardin, Jul 02 2018

Status

approved