A303241 Number of nX7 0..1 arrays with every element equal to 0, 2, 3, 5 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.

1, 123, 236, 1676, 11111, 90728, 686376, 5320294, 42575026, 345713805, 2801331069, 22819881078, 186805008216, 1528961515269, 12526736579284, 102761508859349, 843215927212293, 6920803923723062, 56822359222413226, 466601882566586351

Offset

1,2

Comments

Column 7 of A303242.

Links

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

Example

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

Crossrefs

Cf. A303242.

Sequence in context: A227522 A193431 A306643 * A004945 A004965 A216382

Adjacent sequences: A303238 A303239 A303240 * A303242 A303243 A303244

Keyword

nonn

Author

R. H. Hardin, Apr 20 2018

Status

approved