A298137 Number of nX6 0..1 arrays with every element equal to 2, 3, 5 or 7 king-move adjacent elements, with upper left element zero.

0, 13, 3, 68, 242, 917, 3417, 14533, 58845, 244155, 1024766, 4297121, 17950575, 75199021, 314755111, 1317874937, 5519233903, 23115442566, 96811939884, 405493370013, 1698383143180, 7113695019637, 29796021993208, 124802553668569

Offset

1,2

Comments

Column 6 of A298139.

Links

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

Example

Some solutions for n=7
..0..0..1..1..0..0. .0..0..0..0..0..1. .0..0..0..1..1..0. .0..1..1..0..1..1
..0..1..0..1..1..0. .0..1..1..0..1..1. .0..0..0..1..0..0. .0..0..1..0..0..1
..1..1..0..1..1..1. .0..1..0..1..0..0. .1..1..1..1..1..0. .0..1..1..1..1..0
..0..1..0..0..0..1. .0..1..0..1..0..1. .1..0..0..0..0..1. .1..0..0..0..0..1
..0..0..0..0..1..0. .0..1..0..0..1..1. .0..1..0..1..1..0. .1..0..1..1..1..0
..1..1..0..1..1..0. .0..1..0..1..0..1. .0..1..0..0..1..0. .0..1..1..0..0..1
..1..0..0..1..0..0. .0..0..1..1..0..0. .0..0..1..1..0..0. .0..0..0..0..1..1

Crossrefs

Cf. A298139.

Sequence in context: A005602 A272175 A297874 * A155847 A329983 A204594

Adjacent sequences: A298134 A298135 A298136 * A298138 A298139 A298140

Keyword

nonn

Author

R. H. Hardin, Jan 13 2018

Status

approved