A281651 Number of nX5 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.

8, 2128, 67884, 1887730, 48871479, 1205962480, 28906723792, 677956602812, 15640786492090, 356203262306048, 8028074180509946, 179390514013544068, 3979861287645844782, 87757822187992152076, 1924969472275395326566

Offset

1,1

Comments

Column 5 of A281653.

Links

R. H. Hardin, Table of n, a(n) for n = 1..65

Example

Some solutions for n=3
..0..1..0..0..2. .0..1..2..1..0. .0..1..0..1..0. .0..1..0..1..0
..2..2..0..1..0. .1..0..2..1..0. .0..1..2..2..2. .1..0..0..1..0
..1..1..0..2..0. .0..2..1..0..2. .1..0..2..0..1. .1..2..0..1..0

Crossrefs

Cf. A281653.

Sequence in context: A139298 A004819 A001375 * A189308 A300597 A323588

Adjacent sequences: A281648 A281649 A281650 * A281652 A281653 A281654

Keyword

nonn

Author

R. H. Hardin, Jan 26 2017

Status

approved