A204744 Number of (n+2) X 6 0..2 arrays with every 3 X 3 subblock having three equal elements in a row horizontally, vertically, diagonally or antidiagonally exactly one way, and new values 0..2 introduced in row major order.

2824381, 141179471, 7481378218, 359921488544, 18627221533275, 1007554899863623, 51962183525069234

Offset

1,1

Comments

Column 4 of A204745.

Links

Table of n, a(n) for n=1..7.

Example

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

Crossrefs

Cf. A204745.

Sequence in context: A234189 A321056 A033534 * A258563 A204413 A204789

Adjacent sequences: A204741 A204742 A204743 * A204745 A204746 A204747

Keyword

nonn

Author

R. H. Hardin, Jan 18 2012

Status

approved