A297991 Number of nX6 0..1 arrays with every element equal to 1, 2, 3 or 6 king-move adjacent elements, with upper left element zero.

5, 573, 1274, 4648, 18189, 74675, 290466, 1134198, 4475863, 17501388, 68447326, 268885391, 1056650444, 4151346258, 16317217303, 64161745436, 252378618258, 993086741498, 3908970841059, 15390703083981, 60613211125295

Offset

1,1

Comments

Column 6 of A297993.

Links

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

Example

Some solutions for n=6
..0..1..0..1..1..0. .0..1..1..0..0..0. .0..0..0..1..0..0. .0..0..1..0..1..1
..1..0..1..0..1..0. .0..1..0..1..0..1. .1..1..1..0..1..0. .1..0..1..0..1..0
..1..0..1..0..1..0. .0..1..0..1..1..1. .0..0..1..0..1..1. .1..0..1..0..0..0
..0..0..1..0..1..0. .1..1..0..1..0..1. .1..0..1..0..0..1. .1..0..1..0..1..0
..1..0..1..0..1..1. .0..0..0..1..0..1. .1..0..1..1..1..0. .0..0..1..0..1..0
..1..1..0..1..0..0. .1..1..1..1..0..1. .1..0..0..0..0..0. .1..1..0..1..1..0

Crossrefs

Cf. A297993.

Sequence in context: A274081 A153404 A297821 * A298844 A298651 A299605

Adjacent sequences: A297988 A297989 A297990 * A297992 A297993 A297994

Keyword

nonn

Author

R. H. Hardin, Jan 10 2018

Status

approved