A295651 Number of nX7 0..1 arrays with each 1 horizontally or vertically adjacent to 0, 1, 3 or 4 1s.

81, 3082, 135848, 5812860, 251412699, 10849299317, 468469936974, 20225972157848, 873281057421907, 37704644127498308, 1627934990177639858, 70287640155962885204, 3034736408508547801024, 131027654478169006435181

Offset

1,1

Comments

Column 7 of A295652.

Links

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

Example

Some solutions for n=3
..0..0..1..1..1..0..0. .0..0..1..0..0..0..0. .1..0..1..0..1..0..1
..0..0..0..1..0..1..0. .1..0..0..1..0..0..0. .0..1..1..1..0..1..0
..0..0..0..0..0..0..1. .0..0..0..0..0..0..0. .0..0..1..0..0..0..0

Crossrefs

Cf. A295652.

Sequence in context: A038398 A205902 A295252 * A143652 A270343 A236894

Adjacent sequences: A295648 A295649 A295650 * A295652 A295653 A295654

Keyword

nonn

Author

R. H. Hardin, Nov 25 2017

Status

approved