A295203 Number of nX6 0..1 arrays with each 1 horizontally or vertically adjacent to 2 or 4 1s.

1, 9, 53, 284, 1597, 8241, 40924, 205338, 1042704, 5314555, 27092309, 138002993, 702445256, 3574586491, 18191250083, 92585186127, 471238018339, 2398510082832, 12207851011336, 62134641610255, 316247636411785, 1609610934773928

Offset

1,2

Comments

Column 6 of A295205.

Links

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

R. H. Hardin, Empirical recurrence of order 85

Formula

Empirical recurrence of order 85 (see link above)

Example

Some solutions for n=7
..0..1..1..0..0..0. .0..1..1..0..0..0. .0..1..1..1..1..0. .0..0..0..1..1..1
..1..1..1..0..1..1. .0..1..1..0..0..0. .0..1..0..0..1..0. .0..0..0..1..0..1
..1..1..0..1..1..1. .0..0..0..0..1..1. .1..1..0..0..1..1. .1..1..1..1..0..1
..0..0..1..1..1..0. .1..1..1..0..1..1. .1..0..0..0..0..1. .1..0..0..0..1..1
..0..0..1..1..0..0. .1..0..1..0..0..0. .1..0..0..0..0..1. .1..1..0..0..1..0
..1..1..0..0..1..1. .1..0..1..0..0..0. .1..0..0..0..0..1. .0..1..1..1..1..1
..1..1..0..0..1..1. .1..1..1..0..0..0. .1..1..1..1..1..1. .0..0..0..0..1..1

Crossrefs

Cf. A295205.

Sequence in context: A005025 A122588 A277999 * A334977 A038761 A003698

Adjacent sequences: A295200 A295201 A295202 * A295204 A295205 A295206

Keyword

nonn

Author

R. H. Hardin, Nov 16 2017

Status

approved