A204742 Number of (n+2)X4 0..2 arrays with every 3X3 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

17835, 352950, 7146451, 141179471, 2839352529, 57762265633, 1169004717315, 23699614326315, 481694347006804, 9783482284673750, 198709861019246962, 4037924969719681164, 82048520869992751650, 1667108979331825321864

Offset

1,1

Comments

Column 2 of A204745

Links

R. H. Hardin, Table of n, a(n) for n = 1..210

Example

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

Crossrefs

Sequence in context: A203920 A236649 A054472 * A235782 A235787 A235563

Adjacent sequences: A204739 A204740 A204741 * A204743 A204744 A204745

Keyword

nonn

Author

R. H. Hardin Jan 18 2012

Status

approved