A207225 Number of nX5 0..2 arrays avoiding the patterns z z+1 z or z z-1 z in any row, column or nw-se diagonal.

161, 25921, 1482361, 115679881, 8779228417, 648206318305, 47644493869633, 3508487676429289, 258892474473104753, 19110659117244476825, 1410303052384700607025, 104059081148495261530793

Offset

1,1

Comments

Column 5 of A207228

Links

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

Example

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

Crossrefs

Sequence in context: A135699 A092312 A207232 * A207012 A203334 A272355

Adjacent sequences: A207222 A207223 A207224 * A207226 A207227 A207228

Keyword

nonn

Author

R. H. Hardin, Feb 16 2012

Status

approved