A204953 Number of (n+2)X9 0..2 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..2 introduced in row major order

108053748, 5530809140, 310518886748, 13020576504578, 852919335897276

Offset

1,1

Comments

Column 7 of A204954

Links

Table of n, a(n) for n=1..5.

Example

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

Crossrefs

Sequence in context: A185930 A184572 A184783 * A205414 A208090 A165698

Adjacent sequences: A204950 A204951 A204952 * A204954 A204955 A204956

Keyword

nonn

Author

R. H. Hardin Jan 20 2012

Status

approved