A207475 Number of n X 4 0..3 arrays avoiding the patterns z z+1 z or z z-1 z in any row, column or nw-se diagonal.

214, 45796, 5632964, 768149650, 103954441786, 14048417801822, 1897778216001770, 256411488632156454, 34645010190471447652, 4681055402908503746110, 632477934243918556940818

Offset

1,1

Comments

Column 4 of A207479.

Links

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

Example

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

Crossrefs

Cf. A207479.

Sequence in context: A278093 A259015 A207279 * A207531 A200901 A268547

Adjacent sequences: A207472 A207473 A207474 * A207476 A207477 A207478

Keyword

nonn

Author

R. H. Hardin, Feb 18 2012

Status

approved