A207220 Number of nX7 0..2 arrays avoiding the pattern z z+1 z in any row or column

1465, 2146225, 1950327875, 1721695415743, 1547869995556777, 1395037573042216457, 1256433426475190769775, 1131415114956594837875523, 1018866149319377364919603291, 917523154945563563526500635865

Offset

1,1

Comments

Column 7 of A207221

Links

R. H. Hardin, Table of n, a(n) for n = 1..36

Example

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

Crossrefs

Sequence in context: A206862 A206956 A207988 * A045012 A215849 A204871

Adjacent sequences: A207217 A207218 A207219 * A207221 A207222 A207223

Keyword

nonn

Author

R. H. Hardin Feb 16 2012

Status

approved