A306165 Number of nX7 0..1 arrays with every element unequal to 0, 1, 2, 5, 6 or 7 king-move adjacent elements, with upper left element zero.

64, 101, 523, 2966, 19176, 128710, 842280, 5553315, 36528087, 240890311, 1589377780, 10478113962, 69104073784, 455793498250, 3005985844063, 19825140803190, 130753850843144, 862362210105594, 5687526991833846

Offset

1,1

Comments

Column 7 of A306166.

Links

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

Example

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

Crossrefs

Cf. A306166.

Sequence in context: A305339 A304925 A316419 * A317382 A331455 A039481

Adjacent sequences: A306162 A306163 A306164 * A306166 A306167 A306168

Keyword

nonn

Author

R. H. Hardin, Jun 23 2018

Status

approved