A204347 Number of (n+2)X6 0..3 arrays with no 3X3 subblock having three equal diagonal elements or three equal antidiagonal elements, and new values 0..3 introduced in row major order

1708802980, 4524628081600, 11860456910608960, 31112427702110512128, 81625476908305470240676, 214143463182606762676673040, 561805129589614687626505061188, 1473894249933463522499248333901983

Offset

1,1

Comments

Column 4 of A204351

Links

R. H. Hardin, Table of n, a(n) for n = 1..12

Example

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

Crossrefs

Sequence in context: A202573 A071372 A129474 * A228376 A015411 A034649

Adjacent sequences: A204344 A204345 A204346 * A204348 A204349 A204350

Keyword

nonn

Author

R. H. Hardin Jan 14 2012

Status

approved