A301795 Number of 6 X n 0..1 arrays with every element equal to 0 or 1 horizontally or antidiagonally adjacent elements, with upper left element zero.

32, 233, 96, 116, 150, 205, 294, 438, 671, 1048, 1658, 2645, 4242, 6826, 11007, 17772, 28718, 46429, 75086, 121454, 196479, 317872, 514290, 832101, 1346330, 2178370, 3524639, 5702948, 9227526, 14930413, 24157878, 39088230, 63246047, 102334216

Offset

1,1

Comments

Row 6 of A301790.

Links

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

Formula

Empirical: a(n) = 2*a(n-1) -a(n-3) for n > 6.

Example

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

Crossrefs

Cf. A301790.

Sequence in context: A160061 A269585 A199913 * A301968 A208641 A301889

Adjacent sequences: A301792 A301793 A301794 * A301796 A301797 A301798

Keyword

nonn

Author

R. H. Hardin, Mar 26 2018

Status

approved