A316126 Number of nX4 0..1 arrays with every element unequal to 1, 2, 3, 5, 6 or 7 king-move adjacent elements, with upper left element zero.

2, 45, 197, 1112, 6562, 36480, 204465, 1170851, 6622412, 37527145, 213051804, 1207987372, 6850738403, 38858760572, 220384969476, 1249936673191, 7089251093164, 40207467076807, 228041955210057, 1293371442017860

Offset

1,1

Comments

Column 4 of A316130.

Links

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

R. H. Hardin, Empirical recurrence of order 67

Formula

Empirical recurrence of order 67 (see link above)

Example

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

Crossrefs

Cf. A316130.

Sequence in context: A304693 A200158 A316444 * A317432 A302468 A303250

Adjacent sequences: A316123 A316124 A316125 * A316127 A316128 A316129

Keyword

nonn

Author

R. H. Hardin, Jun 24 2018

Status

approved