A305917 Number of nX7 0..1 arrays with every element unequal to 0, 1, 3, 4, 5 or 7 king-move adjacent elements, with upper left element zero.

21, 289, 312, 4982, 57465, 811996, 18643274, 371733699, 6830409319, 143897189930, 2971442216847, 59080121487287, 1211031708383269, 24872652363493440, 504919099584347536, 10304854339183282114, 210797145712163688250

Offset

1,1

Comments

Column 7 of A305918.

Links

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

Example

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

Crossrefs

Cf. A305918.

Sequence in context: A346844 A188710 A304354 * A316238 A317159 A305648

Adjacent sequences: A305914 A305915 A305916 * A305918 A305919 A305920

Keyword

nonn

Author

R. H. Hardin, Jun 14 2018

Status

approved