A316874 Number of nX6 0..1 arrays with every element unequal to 0, 1, 2, 3, 5, 6 or 7 king-move adjacent elements, with upper left element zero.

32, 569, 8333, 129974, 1956634, 30894538, 486546897, 7638934647, 120283055361, 1895243968523, 29842332090772, 469905213435541, 7400658538522109, 116551430268916832, 1835472107789693038, 28905788220955382465

Offset

1,1

Comments

Column 6 of A316876.

Links

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

Example

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

Crossrefs

Cf. A316876.

Sequence in context: A317123 A305591 A317009 * A317602 A054338 A234435

Adjacent sequences: A316871 A316872 A316873 * A316875 A316876 A316877

Keyword

nonn

Author

R. H. Hardin, Jul 15 2018

Status

approved