A299217 Number of nX4 0..1 arrays with every element equal to 0, 2, 3, 4, 6 or 7 king-move adjacent elements, with upper left element zero.

1, 37, 81, 427, 2338, 13458, 84948, 543741, 3534493, 23192676, 152386263, 1003140993, 6609135301, 43551719814, 287046844098, 1892053858627, 12471668276710, 82210001337166, 541910867484011, 3572172049448373

Offset

1,2

Comments

Column 4 of A299221.

Links

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

R. H. Hardin, Empirical recurrence of order 66

Formula

Empirical recurrence of order 66 (see link above)

Example

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

Crossrefs

Cf. A299221.

Sequence in context: A141895 A262566 A323428 * A172193 A141918 A063325

Adjacent sequences: A299214 A299215 A299216 * A299218 A299219 A299220

Keyword

nonn

Author

R. H. Hardin, Feb 05 2018

Status

approved