A207056 Number of nX7 0..3 arrays avoiding the pattern z-1 z-1 z in any row or column

12747, 162486009, 1505319709390, 13734678041147631, 125023718189363499045, 1137807775272657922493117, 10355292626528629423108103805

Offset

1,1

Comments

Column 7 of A207057

Links

Table of n, a(n) for n=1..7.

Example

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

Crossrefs

Sequence in context: A206973 A206576 A207581 * A210105 A235720 A187600

Adjacent sequences: A207053 A207054 A207055 * A207057 A207058 A207059

Keyword

nonn

Author

R. H. Hardin Feb 14 2012

Status

approved