A305088 Number of nX7 0..1 arrays with every element unequal to 1, 2, 3, 6 or 7 king-move adjacent elements, with upper left element zero.

8, 346, 920, 1016, 39016, 285422, 630306, 12378708, 108542087, 472695509, 5199121658, 46704561668, 282819566127, 2484588647059, 21486126090213, 151693481573725, 1234399626861450, 10281426006005255, 77725590704286319

Offset

1,1

Comments

Column 7 of A305089.

Links

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

Example

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

Crossrefs

Cf. A305089.

Sequence in context: A193225 A304148 A305488 * A316739 A079485 A193504

Adjacent sequences: A305085 A305086 A305087 * A305089 A305090 A305091

Keyword

nonn

Author

R. H. Hardin, May 25 2018

Status

approved