A297504 Number of nX6 0..1 arrays with every 1 horizontally, diagonally or antidiagonally adjacent to 1 or 2 neighboring 1s.

21, 729, 8803, 191192, 3624914, 66289769, 1272836591, 23896899569, 450529429259, 8509989217247, 160423654526876, 3026744089971807, 57099188342748031, 1077069529621543033, 20318551052028606846, 383290619891741250595

Offset

1,1

Comments

Column 6 of A297506.

Links

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

Example

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

Crossrefs

Cf. A297506.

Sequence in context: A009167 A012479 A317824 * A250059 A250060 A078791

Adjacent sequences: A297501 A297502 A297503 * A297505 A297506 A297507

Keyword

nonn

Author

R. H. Hardin, Dec 31 2017

Status

approved