A306142 Number of nX7 0..1 arrays with every element unequal to 1, 2, 3, 4, 6 or 7 king-move adjacent elements, with upper left element zero.

8, 4184, 79839, 2880944, 114440831, 3871080422, 138192505287, 4979043059695, 176429151145679, 6292688444495891, 224492394855179697, 7996800997805828281, 285059535256378607710, 10161092061905988608588, 362149341462830459252149

Offset

1,1

Comments

Column 7 of A306143.

Links

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

Example

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

Crossrefs

Cf. A306143.

Sequence in context: A316582 A304596 A316382 * A317375 A100351 A045478

Adjacent sequences: A306139 A306140 A306141 * A306143 A306144 A306145

Keyword

nonn

Author

R. H. Hardin, Jun 22 2018

Status

approved