A210087 Number of (n+1) X (n+1) 0..2 arrays containing all values 0..2 with every 2 X 2 subblock having one or two distinct values, and new values 0..2 introduced in row major order.

0, 169, 57232, 57786977, 209465946364, 2887918719647127, 155235965473002555740, 32957218604273839302036966, 27844021444678245712948156418880, 94058066849689205593691581157744700550

Offset

1,2

Comments

Diagonal of A210095.

Links

Table of n, a(n) for n=1..10.

Example

Some solutions for n=4
..0..1..0..2..1....0..0..0..1..2....0..1..2..0..1....0..0..0..0..0
..0..1..0..2..1....0..1..0..1..2....0..1..2..0..1....0..0..1..0..1
..0..0..0..2..2....0..0..0..1..2....0..1..2..0..1....1..1..1..0..0
..0..0..0..2..2....1..0..1..1..1....1..1..2..0..1....1..2..1..1..1
..0..1..0..2..0....0..1..1..2..1....2..1..2..0..0....1..2..1..2..2

Crossrefs

Cf. A210095.

Sequence in context: A006051 A069742 A069743 * A135824 A195219 A195276

Adjacent sequences: A210084 A210085 A210086 * A210088 A210089 A210090

Keyword

nonn

Author

R. H. Hardin, Mar 17 2012

Status

approved