A204952 Number of (n+2)X8 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

14289768, 523821125, 21551078590, 691810208216, 31154215435107

Offset

1,1

Comments

Column 6 of A204954

Links

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

Example

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

Crossrefs

Sequence in context: A034634 A014497 A237141 * A210019 A111346 A238080

Adjacent sequences: A204949 A204950 A204951 * A204953 A204954 A204955

Keyword

nonn

Author

R. H. Hardin Jan 20 2012

Status

approved