A297511 Number of 6Xn 0..1 arrays with every 1 horizontally, diagonally or antidiagonally adjacent to 1 or 2 neighboring 1s.

1, 876, 11405, 88808, 3075264, 66289769, 978288822, 19677228473, 410226893539, 7428573953424, 139931054756836, 2750243232989133, 52290968094715743, 990034495588191380, 19031260437956001426, 364274317770524751427

Offset

1,2

Comments

Row 6 of A297506.

Links

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

Example

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

Crossrefs

Cf. A297506.

Sequence in context: A252212 A038658 A065700 * A297725 A185989 A190930

Adjacent sequences: A297508 A297509 A297510 * A297512 A297513 A297514

Keyword

nonn

Author

R. H. Hardin, Dec 31 2017

Status

approved