A206733 Number of nX7 0..2 arrays avoiding the pattern z-1 z-1 z in any row, column or nw-to-se diagonal

1440, 2073600, 1384146457, 908849973079, 589775000656222, 385349885596244259, 253106740389132162761, 166433712100588056160567, 109508284560033534763140584, 72053875944178720300448056773

Offset

1,1

Comments

Column 7 of A206734

Links

R. H. Hardin, Table of n, a(n) for n = 1..24

Example

Some solutions for n=4
..0..1..2..1..1..0..1....0..2..0..2..2..2..0....1..1..0..1..1..1..1
..0..1..0..0..0..0..0....2..2..0..1..2..0..2....1..0..0..0..2..2..1
..0..0..2..2..2..2..1....1..0..2..1..2..1..2....0..2..2..0..2..2..1
..0..2..0..1..2..2..1....2..1..2..0..2..2..2....0..2..2..2..2..2..0

Crossrefs

Sequence in context: A282330 A207213 A207207 * A207357 A207200 A119422

Adjacent sequences: A206730 A206731 A206732 * A206734 A206735 A206736

Keyword

nonn

Author

R. H. Hardin Feb 11 2012

Status

approved