A316310 Number of nX7 0..1 arrays with every element unequal to 0, 1, 3, 4, 6 or 8 king-move adjacent elements, with upper left element zero.

21, 127, 168, 1046, 4583, 17487, 96175, 534083, 2689151, 15357780, 89959730, 517714307, 3063955854, 18343096898, 109721387508, 660612374692, 3991562407488, 24145509389500, 146334159352398, 887846840631706

Offset

1,1

Comments

Column 7 of A316311.

Links

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

Example

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

Crossrefs

Cf. A316311.

Sequence in context: A316551 A304543 A306128 * A317265 A213565 A041852

Adjacent sequences: A316307 A316308 A316309 * A316311 A316312 A316313

Keyword

nonn

Author

R. H. Hardin, Jun 29 2018

Status

approved