A298666 Number of nX7 0..1 arrays with every element equal to 0, 3, 4, 6 or 7 king-move adjacent elements, with upper left element zero.

1, 8, 7, 13, 84, 238, 978, 3895, 11843, 49752, 184380, 640323, 2550161, 9291605, 34411340, 132207077, 488538547, 1844610495, 6998077491, 26247637676, 99671069188, 378042682211, 1432299046200, 5458358304491, 20789207845451

Offset

1,2

Comments

Column 7 of A298667.

Links

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

Example

Some solutions for n=8
..0..1..1..1..1..1..0. .0..1..0..1..0..1..0. .0..0..1..0..0..0..0
..1..1..1..0..0..1..1. .1..1..1..1..1..1..1. .0..0..0..0..1..0..0
..0..1..1..0..0..0..1. .1..1..1..1..1..1..1. .0..1..0..0..0..0..1
..1..1..0..0..0..0..1. .0..1..1..0..1..0..1. .0..0..0..1..0..0..0
..1..1..1..0..0..1..1. .1..1..1..1..1..1..1. .0..0..0..0..0..1..0
..1..0..1..1..1..1..0. .0..1..1..1..1..1..0. .1..0..0..0..0..0..0
..1..1..1..1..1..1..1. .1..1..1..0..1..1..1. .0..0..1..0..0..0..0
..1..1..0..1..0..1..1. .0..1..1..1..1..1..0. .0..0..0..0..1..0..1

Crossrefs

Cf. A298667.

Sequence in context: A286839 A277915 A051011 * A309628 A303716 A309629

Adjacent sequences: A298663 A298664 A298665 * A298667 A298668 A298669

Keyword

nonn

Author

R. H. Hardin, Jan 24 2018

Status

approved