A205412 Number of (n+2)X7 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

1820215, 64878898, 2553087985, 67792717447, 2520131261396, 98445276297551, 3148208484619590, 113563473572336662, 4281011039064902788

Offset

1,1

Comments

Column 5 of A205415

Links

Table of n, a(n) for n=1..9.

Example

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

Crossrefs

Sequence in context: A145537 A183735 A147525 * A249211 A244074 A204951

Adjacent sequences: A205409 A205410 A205411 * A205413 A205414 A205415

Keyword

nonn

Author

R. H. Hardin Jan 26 2012

Status

approved