A204778 Number of (n+2)X6 0..2 arrays with no 3X3 subblock having three equal diagonal elements or three equal antidiagonal elements, and new values 0..2 introduced in row major order

25190406, 8643947616, 2890032532056, 966430412947296, 323760110018338584, 108409087458981913446, 36302705908249227882336, 12156529288557135619738464, 4070799905213442743056301814

Offset

1,1

Comments

Column 4 of A204782

Links

R. H. Hardin, Table of n, a(n) for n = 1..31

Example

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

Crossrefs

Sequence in context: A206084 A187439 A175580 * A172795 A056915 A233448

Adjacent sequences: A204775 A204776 A204777 * A204779 A204780 A204781

Keyword

nonn

Author

R. H. Hardin Jan 19 2012

Status

approved