A281692 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 two elements, and with new values introduced in order 0 sequentially upwards.

2, 2516, 172398, 7497214, 269206287, 8480641650, 247006584444, 6815559005187, 180758325599469, 4651322821630888, 116867935942588517, 2880186240231368394, 69855942933376910951, 1671655361771688974424, 39546593568768406440467

Offset

1,1

Comments

Column 5 of A281693.

Links

R. H. Hardin, Table of n, a(n) for n = 1..28

Example

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

Crossrefs

Cf. A281693.

Sequence in context: A274962 A199948 A261382 * A225221 A347654 A324426

Adjacent sequences: A281689 A281690 A281691 * A281693 A281694 A281695

Keyword

nonn

Author

R. H. Hardin, Jan 27 2017

Status

approved