A298621 Number of nX7 0..1 arrays with every element equal to 1, 3, 4, 5 or 7 king-move adjacent elements, with upper left element zero.

0, 240, 88, 4068, 51213, 480343, 10823065, 161922923, 2400592063, 44083556765, 752293726555, 11956613279238, 210428029078777, 3622125456608840, 59808591189923678, 1031998208853433156, 17707660917785401664

Offset

1,2

Comments

Column 7 of A298622.

Links

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

Example

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

Crossrefs

Cf. A298622.

Sequence in context: A282230 A015161 A298833 * A299587 A078151 A278179

Adjacent sequences: A298618 A298619 A298620 * A298622 A298623 A298624

Keyword

nonn

Author

R. H. Hardin, Jan 23 2018

Status

approved