A207988 Number of nX7 0..2 arrays avoiding the pattern z z+1 z horizontally and z z-1 z vertically

1465, 2146225, 1889730415, 1607243845009, 1389619561706920, 1204494622138201455, 1043523305166893694120, 903935606226751254974991, 783031438431844846908049583, 678304096543940446283085485892

Offset

1,1

Comments

Column 7 of A207989

Links

R. H. Hardin, Table of n, a(n) for n = 1..134

Example

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

Crossrefs

Sequence in context: A278368 A206862 A206956 * A207220 A045012 A215849

Adjacent sequences: A207985 A207986 A207987 * A207989 A207990 A207991

Keyword

nonn

Author

R. H. Hardin Feb 22 2012

Status

approved