A301605 Number of nX5 0..1 arrays with every element equal to 0, 2 or 3 horizontally or vertically adjacent elements, with upper left element zero.

1, 6, 13, 65, 330, 1297, 6393, 30904, 154041, 764894, 3804884, 18978589, 94697319, 472770928, 2360757090, 11789229577, 58877258002, 294049444613, 1468594070621, 7334774136424, 36633069686965, 182962072923069, 913796219872826

Offset

1,2

Comments

Column 5 of A301608.

Links

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

Example

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

Crossrefs

Cf. A301608.

Sequence in context: A111366 A177127 A177175 * A119110 A041305 A215755

Adjacent sequences: A301602 A301603 A301604 * A301606 A301607 A301608

Keyword

nonn

Author

R. H. Hardin, Mar 24 2018

Status

approved