A204288 Number of (n+2)X6 0..3 arrays with every 3X3 subblock having three equal elements in a row horizontally, vertically, diagonally or antidiagonally exactly two different ways, and new values 0..3 introduced in row major order

1429921, 69321821, 3531083953, 103672509054, 5112434552746, 246289063621747, 8867170877747911, 413064418681389891

Offset

1,1

Comments

Column 4 of A204289

Links

Table of n, a(n) for n=1..8.

Example

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

Crossrefs

Sequence in context: A186837 A054852 A242824 * A321040 A345614 A346331

Adjacent sequences: A204285 A204286 A204287 * A204289 A204290 A204291

Keyword

nonn

Author

R. H. Hardin Jan 13 2012

Status

approved