A206965 Number of nX6 0..3 arrays avoiding the pattern z z+1 z in any row, column or nw-to-se diagonal.

3361, 11296321, 24271094606, 51177439652621, 109307204667939468, 233756297269025517833, 499734187386667201802301, 1068275373878472160184314777, 2283648282818054295043022742565

Offset

1,1

Comments

Column 6 of A206967

Links

R. H. Hardin, Table of n, a(n) for n = 1..14

Example

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

Crossrefs

Sequence in context: A020434 A061334 A206795 * A209090 A207132 A175534

Adjacent sequences: A206962 A206963 A206964 * A206966 A206967 A206968

Keyword

nonn

Author

R. H. Hardin, Feb 14 2012

Status

approved