A204313 Number of (n+2)X6 0..2 arrays with every 3X3 subblock having three equal elements in a row horizontally, vertically, diagonally or antidiagonally, and new values 0..2 introduced in row major order

15015804, 4174580535, 1225171069740, 322734860977140, 87856146496713616, 24056313371018644679

Offset

1,1

Comments

Column 4 of A204314

Links

Table of n, a(n) for n=1..6.

Example

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

Crossrefs

Sequence in context: A345120 A227286 A125565 * A186803 A221561 A221559

Adjacent sequences: A204310 A204311 A204312 * A204314 A204315 A204316

Keyword

nonn

Author

R. H. Hardin Jan 14 2012

Status

approved