A317262 Number of nX4 0..1 arrays with every element unequal to 0, 1, 3, 4, 6, 7 or 8 king-move adjacent elements, with upper left element zero.

5, 17, 21, 74, 158, 440, 1220, 3655, 10907, 33353, 105116, 333129, 1058444, 3400117, 10980660, 35537467, 115249353, 374708401, 1220117014, 3975988754, 12966960042, 42319911302, 138179803155, 451316645803, 1474484612919, 4818324435958

Offset

1,1

Comments

Column 4 of A317266.

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..0..0..0. .0..0..0..0. .0..0..0..1. .0..1..0..1. .0..0..0..0
..1..0..0..1. .0..1..0..0. .0..0..0..0. .1..1..0..0. .0..0..0..0
..1..1..0..1. .1..1..0..1. .0..0..0..0. .0..0..0..0. .1..0..0..1
..1..1..0..0. .0..0..0..1. .0..0..0..1. .0..1..1..0. .0..1..1..0
..1..0..0..0. .1..0..0..0. .0..0..1..1. .1..1..1..1. .1..1..1..1

Crossrefs

Cf. A317266.

Sequence in context: A029986 A076275 A316307 * A031270 A022141 A322985

Adjacent sequences: A317259 A317260 A317261 * A317263 A317264 A317265

Keyword

nonn

Author

R. H. Hardin, Jul 25 2018

Status

approved