A317702 Number of n X 7 0..1 arrays with every element unequal to 0, 2, 3, 4, 5, 6, 7 or 8 king-move adjacent elements, with upper left element zero.

1, 908, 31197, 2937685, 261020405, 23660712291, 2157266427366, 197276106238236, 18056111727655363, 1653387454293917334, 151427099804330837933, 13869585087775360921262, 1270388799979224218690489

Offset

1,2

Comments

Column 7 of A317703.

Links

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

Example

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

Crossrefs

Cf. A317703.

Sequence in context: A305684 A317064 A316931 * A214001 A252136 A216930

Adjacent sequences: A317699 A317700 A317701 * A317703 A317704 A317705

Keyword

nonn

Author

R. H. Hardin, Aug 04 2018

Status

approved