A296540 Number of nX7 0..1 arrays with each 1 horizontally, vertically or antidiagonally adjacent to 2 or 4 neighboring 1s.

1, 45, 654, 5601, 53995, 560942, 5705431, 57470370, 581613058, 5896361722, 59744304510, 605287549399, 6133281385115, 62150472842382, 629792949015747, 6381981797680641, 64672057071608258, 655359047486913615

Offset

1,2

Comments

Column 7 of A296541.

Links

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

Example

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

Crossrefs

Cf. A296541.

Sequence in context: A282767 A160234 A110691 * A105251 A099632 A264138

Adjacent sequences: A296537 A296538 A296539 * A296541 A296542 A296543

Keyword

nonn

Author

R. H. Hardin, Dec 15 2017

Status

approved