A281652 Number of nX6 0..2 arrays with no element equal to more than one of its horizontal, diagonal or antidiagonal neighbors, with the exception of exactly one element, and with new values introduced in order 0 sequentially upwards.

28, 10512, 519656, 23075928, 955490042, 37763465272, 1449940771656, 54481157985120, 2013987013843948, 73499046502446216, 2654628744412422502, 95064295609902663936, 3380059487036411031246, 119451269294771081739640

Offset

1,1

Comments

Column 6 of A281653.

Links

R. H. Hardin, Table of n, a(n) for n = 1..16

Example

Some solutions for n=2
..0..1..2..2..1..0. .0..1..0..1..0..1. .0..1..0..2..1..1. .0..1..2..0..1..2
..2..0..1..2..0..1. .1..2..0..2..1..1. .1..2..1..0..2..0. .0..1..0..0..2..0

Crossrefs

Cf. A281653.

Sequence in context: A222018 A283891 A283892 * A221691 A159415 A209177

Adjacent sequences: A281649 A281650 A281651 * A281653 A281654 A281655

Keyword

nonn

Author

R. H. Hardin, Jan 26 2017

Status

approved