A205411 Number of (n+2)X6 0..2 arrays with every 3X3 subblock having three equal elements in a row horizontally, vertically or nw-to-se diagonally exactly two ways, and new values 0..2 introduced in row major order

236576, 5686031, 151598017, 2839359056, 67792717447, 1715387177450, 36803297869771, 858554973465776, 20804813475950945, 468182020666807407, 10859505355533459702, 257344051938542231086, 5904014034167014999764

Offset

1,1

Comments

Column 4 of A205415

Links

R. H. Hardin, Table of n, a(n) for n = 1..88

Example

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

Crossrefs

Sequence in context: A092009 A160920 A235105 * A219921 A344352 A344353

Adjacent sequences: A205408 A205409 A205410 * A205412 A205413 A205414

Keyword

nonn

Author

R. H. Hardin Jan 26 2012

Status

approved