A316798 Number of nX5 0..1 arrays with every element unequal to 2, 3, 5, 6, 7 or 8 king-move adjacent elements, with upper left element zero.

0, 18, 31, 170, 792, 3759, 18897, 91138, 476043, 2434631, 12363865, 63517567, 326131379, 1671754689, 8572647264, 44017843069, 225847266812, 1158829313595, 5947763981588, 30523170292757, 156640465674701, 803891068081321

Offset

1,2

Comments

Column 5 of A316801.

Links

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

Example

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

Crossrefs

Cf. A316801.

Sequence in context: A287683 A182254 A305220 * A070744 A137600 A299707

Adjacent sequences: A316795 A316796 A316797 * A316799 A316800 A316801

Keyword

nonn

Author

R. H. Hardin, Jul 14 2018

Status

approved