A295119 Number of nX7 0..1 arrays with each 1 horizontally or vertically adjacent to 1 or 4 1s.

13, 178, 1960, 24347, 295083, 3590821, 43655680, 530696748, 6452840307, 78464174127, 953998068679, 11599362088138, 141035410432226, 1714816891986887, 20850061397844599, 253511401875888073

Offset

1,1

Comments

Column 7 of A295120.

Links

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

Example

Some solutions for n=4
..1..0..1..0..1..0..0. .1..1..0..0..1..0..1. .0..0..0..1..0..0..0
..1..0..1..0..1..0..0. .0..0..0..0..1..0..1. .0..0..1..1..1..0..0
..0..0..0..0..0..1..0. .0..0..0..0..0..0..0. .1..0..0..1..0..0..0
..1..1..0..0..0..1..0. .0..0..0..1..1..0..0. .1..0..0..0..0..0..0

Crossrefs

Cf. A295120.

Sequence in context: A331496 A196435 A197198 * A196956 A132386 A127390

Adjacent sequences: A295116 A295117 A295118 * A295120 A295121 A295122

Keyword

nonn

Author

R. H. Hardin, Nov 15 2017

Status

approved