A304425 Number of nX6 0..1 arrays with every element unequal to 1, 2, 3, 4 or 5 king-move adjacent elements, with upper left element zero.

5, 1493, 33263, 1043316, 30362267, 898146670, 26510744474, 783174010085, 23137703330738, 683623975475552, 20199051830780465, 596830534656558763, 17634986814152323681, 521075710061846580996, 15396691883833645691809

Offset

1,1

Comments

Column 6 of A304427.

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

Crossrefs

Cf. A304427.

Sequence in context: A172920 A062598 A203690 * A316280 A305959 A317220

Adjacent sequences: A304422 A304423 A304424 * A304426 A304427 A304428

Keyword

nonn

Author

R. H. Hardin, May 12 2018

Status

approved