A207226 - OEIS

A207226

Number of nX6 0..2 arrays avoiding the patterns z z+1 z or z z-1 z in any row, column or nw-se diagonal

425, 180625, 21553541, 3814387801, 648206318305, 105855104360481, 17182219699443153, 2796398012458324953, 456641535527116726913, 74625179886401434526953, 12190343017464128551053825

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OFFSET

1,1

COMMENTS

Column 6 of A207228

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..105

EXAMPLE

Some solutions for n=4

..0..2..1..1..1..1....1..2..2..2..1..0....2..0..1..2..0..2....1..2..2..2..1..0

..0..0..1..2..2..0....0..1..2..2..0..1....1..0..2..1..0..2....2..2..1..0..2..1

..0..0..2..0..2..2....0..0..2..2..0..1....0..2..2..0..0..2....2..2..0..1..2..2

..0..1..2..0..0..2....0..2..0..2..1..1....2..2..0..0..2..2....1..0..2..2..1..0

CROSSREFS

Sequence in context: A349940 A203343 A207233 * A207013 A048922 A305267

Adjacent sequences: A207223 A207224 A207225 * A207227 A207228 A207229

KEYWORD

nonn

AUTHOR

R. H. Hardin Feb 16 2012

STATUS

approved