A317464 Number of n X 7 0..1 arrays with every element unequal to 2, 3, 4, 5, 6, 7 or 8 king-move adjacent elements, with upper left element zero.

0, 702, 23769, 2461839, 217053933, 19791556259, 1798167135483, 163704740864606, 14901625879985868, 1356614521758787991, 123505280880147646092, 11243904551087304512854, 1023645417762237809385664

Offset

1,2

Comments

Column 7 of A317465.

Links

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

Example

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

Crossrefs

Cf. A317465.

Sequence in context: A316685 A304766 A316510 * A035852 A214486 A045146

Adjacent sequences: A317461 A317462 A317463 * A317465 A317466 A317467

Keyword

nonn

Author

R. H. Hardin, Jul 28 2018

Status

approved