A206792 Number of nX3 0..3 arrays avoiding the pattern z z+1 z in any row, column, diagonal or antidiagonal

61, 3721, 180446, 8683735, 420657877, 20388622016, 988006480837, 47875604265753, 2319909967411854, 112416368647596277, 5447383252826053743, 263964878153391214108, 12790995849530364514091, 619815723744309803868951

Offset

1,1

Comments

Column 3 of A206797

Links

R. H. Hardin, Table of n, a(n) for n = 1..210

Example

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

Crossrefs

Sequence in context: A207011 A206975 A206969 * A206962 A206572 A207577

Adjacent sequences: A206789 A206790 A206791 * A206793 A206794 A206795

Keyword

nonn

Author

R. H. Hardin Feb 12 2012

Status

approved