A184377 1/12 the number of (n+2)X(n+2) 0..2 arrays with each 3X3 subblock containing three of each value

140, 1494, 8936, 38642, 207470, 890982, 3651098

Offset

1,1

Comments

Diagonal of A184386

Links

Table of n, a(n) for n=1..7.

Example

Some solutions with a(1,1)=0 for 4X4
..0..1..2..0....0..2..2..0....0..2..1..0....0..1..2..0....0..2..0..2
..1..2..2..1....2..1..0..2....0..0..1..1....0..1..0..0....2..0..2..0
..0..0..1..0....0..1..1..0....1..2..2..0....2..2..1..2....1..1..1..1
..1..2..0..1....2..2..0..2....1..0..2..1....0..1..2..0....0..0..2..2

Crossrefs

Sequence in context: A330446 A317984 A133711 * A255775 A199831 A264310

Adjacent sequences: A184374 A184375 A184376 * A184378 A184379 A184380

Keyword

nonn

Author

R. H. Hardin Jan 12 2011

Status

approved