A317602 Number of nX6 0..1 arrays with every element unequal to 0, 1, 2, 3, 5, 6, 7 or 8 king-move adjacent elements, with upper left element zero.

32, 569, 8872, 143866, 2349106, 40015089, 679103465, 11512061359, 195586936443, 3322899310077, 56438373128526, 958683618871687, 16285233288928179, 276632350626287296, 4699064825018901907, 79821897002306913942

Offset

1,1

Comments

Column 6 of A317604.

Links

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

Example

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

Crossrefs

Cf. A317604.

Sequence in context: A305591 A317009 A316874 * A054338 A234435 A010557

Adjacent sequences: A317599 A317600 A317601 * A317603 A317604 A317605

Keyword

nonn

Author

R. H. Hardin, Aug 01 2018

Status

approved