A207474 Number of nX3 0..3 arrays avoiding the patterns z z+1 z or z z-1 z in any row, column or nw-se diagonal

58, 3364, 133556, 5632964, 236422326, 9918542118, 415949940602, 17445552068794, 731700177749008, 30688945043507104, 1287152210679243960, 53985590138076197056, 2264257474181354143802, 94967231394228308838804

Offset

1,1

Comments

Column 3 of A207479

Links

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

Example

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

Crossrefs

Sequence in context: A299467 A334935 A207278 * A207530 A042625 A250919

Adjacent sequences: A207471 A207472 A207473 * A207475 A207476 A207477

Keyword

nonn

Author

R. H. Hardin Feb 18 2012

Status

approved