A207554 Number of 6Xn 0..2 arrays avoiding the pattern z-2 z-1 z in any row, column, nw-to-se diagonal or ne-to-sw antidiagonal

622, 386884, 153718531, 57282563287, 21553876840265, 8153351029428092, 3082694275519480041, 1165102509595020126200, 440237796175859581158560, 166342251234958398609975741, 62849915005715508846282647469

Offset

1,1

Comments

Row 6 of A207550

Links

R. H. Hardin, Table of n, a(n) for n = 1..167

Example

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

Crossrefs

Sequence in context: A224432 A229318 A268025 * A207548 A207315 A206698

Adjacent sequences: A207551 A207552 A207553 * A207555 A207556 A207557

Keyword

nonn

Author

R. H. Hardin Feb 18 2012

Status

approved