A305345 Number of nX6 0..1 arrays with every element unequal to 0, 1, 3, 5 or 8 king-move adjacent elements, with upper left element zero.

13, 105, 126, 454, 1729, 5408, 17054, 58109, 187782, 603230, 1995190, 6520429, 21144350, 69245859, 226468041, 737659360, 2409323948, 7873600196, 25689526682, 83865350045, 273916886308, 894189316717, 2919142354022, 9531957692014

Offset

1,1

Comments

Column 6 of A305347.

Links

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

Example

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

Crossrefs

Cf. A305347.

Sequence in context: A041316 A304667 A306170 * A316613 A316425 A317427

Adjacent sequences: A305342 A305343 A305344 * A305346 A305347 A305348

Keyword

nonn

Author

R. H. Hardin, May 30 2018

Status

approved