A301539 Number of nX6 0..1 arrays with every element equal to 0, 1 or 3 horizontally or vertically adjacent elements, with upper left element zero.

13, 42, 154, 603, 2417, 10783, 47791, 215362, 990403, 4616134, 21616069, 101719485, 480319135, 2272163307, 10763099175, 51036985495, 242162709431, 1149466726275, 5457682636775, 25918135231397, 123098181426713, 584702778533156

Offset

1,1

Comments

Column 6 of A301541.

Links

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

Example

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

Crossrefs

Cf. A301541.

Sequence in context: A233298 A243028 A242544 * A240517 A074022 A232448

Adjacent sequences: A301536 A301537 A301538 * A301540 A301541 A301542

Keyword

nonn

Author

R. H. Hardin, Mar 23 2018

Status

approved