A304132 Number of nX7 0..1 arrays with every element unequal to 0, 1, 3 or 6 king-move adjacent elements, with upper left element zero.

21, 103, 89, 244, 582, 1321, 2945, 6333, 13315, 28932, 63006, 134021, 284831, 607277, 1291893, 2755806, 5876374, 12482965, 26539285, 56520687, 120314557, 256086726, 545101754, 1160070321, 2469739659, 5259410891, 11198740071, 23845751230

Offset

1,1

Comments

Column 7 of A304133.

Links

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

R. H. Hardin, Empirical recurrence of order 79

Formula

Empirical recurrence of order 79 (see link above)

Example

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

Crossrefs

Cf. A304133.

Sequence in context: A076454 A208538 A303681 * A304220 A305481 A219385

Adjacent sequences: A304129 A304130 A304131 * A304133 A304134 A304135

Keyword

nonn

Author

R. H. Hardin, May 07 2018

Status

approved