A297681 Number of nX7 0..1 arrays with every 1 horizontally, diagonally or antidiagonally adjacent to 0, 1 or 4 neighboring 1s.

81, 1632, 52889, 1519630, 45865837, 1368968852, 41030621948, 1229127412701, 36837288191422, 1103993847036050, 33088254114520559, 991712287397354032, 29723613829882860702, 890879134522839275761, 26701570968782131551720

Offset

1,1

Comments

Column 7 of A297682.

Links

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

Example

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

Crossrefs

Cf. A297682.

Sequence in context: A237559 A223279 A096302 * A237404 A237549 A107914

Adjacent sequences: A297678 A297679 A297680 * A297682 A297683 A297684

Keyword

nonn

Author

R. H. Hardin, Jan 03 2018

Status

approved