A204505 Number of (n+2)X(n+2) 0..2 arrays with every 3X3 subblock having three equal elements in a row horizontally, vertically, diagonally or antidiagonally at least two different ways, and new values 0..2 introduced in row major order

652, 164248, 161927101, 299144720528, 2274909402099901

Offset

1,1

Comments

Diagonal of A204511

Links

Table of n, a(n) for n=1..5.

Example

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

Crossrefs

Sequence in context: A204511 A204506 A282558 * A350979 A188414 A089673

Adjacent sequences: A204502 A204503 A204504 * A204506 A204507 A204508

Keyword

nonn

Author

R. H. Hardin Jan 15 2012

Status

approved