A317860 Number of nX5 0..1 arrays with every element unequal to 1, 2 or 4 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.

3, 21, 32, 155, 350, 1001, 2616, 7926, 21882, 65134, 190018, 559868, 1657078, 4911800, 14594042, 43385463, 129133814, 384672503, 1145753084, 3415594783, 10180797904, 30355084163, 90514426385, 269916109949, 804962375711

Offset

1,1

Comments

Column 5 of A317863.

Links

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

Example

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

Crossrefs

Cf. A317863.

Sequence in context: A292310 A045802 A006133 * A039766 A072849 A287930

Adjacent sequences: A317857 A317858 A317859 * A317861 A317862 A317863

Keyword

nonn

Author

R. H. Hardin, Aug 09 2018

Status

approved