A207581 Number of nX7 0..3 arrays avoiding the pattern z+1 z+1 z horizontally and z-1 z-1 z vertically

12747, 162486009, 1495251731248, 13535979641561061, 122196720716205612586, 1102841040771965457584054

Offset

1,1

Comments

Column 7 of A207582

Links

Table of n, a(n) for n=1..6.

Example

Some solutions for n=4
..1..0..2..1..0..3..3....2..1..2..3..0..1..2....1..0..0..0..0..3..1
..3..3..3..3..1..3..1....0..0..1..3..0..2..0....2..1..0..1..3..1..3
..3..0..0..1..0..2..0....3..0..2..0..3..1..1....3..1..2..3..0..1..0
..1..0..2..0..1..1..1....2..0..2..0..1..0..3....0..1..0..0..1..1..3

Crossrefs

Sequence in context: A206979 A206973 A206576 * A207056 A210105 A235720

Adjacent sequences: A207578 A207579 A207580 * A207582 A207583 A207584

Keyword

nonn

Author

R. H. Hardin Feb 19 2012

Status

approved