A206862 Number of nX7 0..2 arrays avoiding the pattern z z+1 z in any row, column, diagonal or antidiagonal

1465, 2146225, 1090023439, 541018725304, 303316860005399, 169438223533971179, 92792498733436652359, 50788865481935185946431

Offset

1,1

Comments

Column 7 of A206863

Links

Table of n, a(n) for n=1..8.

Example

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

Crossrefs

Sequence in context: A280906 A321010 A278368 * A206956 A207988 A207220

Adjacent sequences: A206859 A206860 A206861 * A206863 A206864 A206865

Keyword

nonn

Author

R. H. Hardin Feb 13 2012

Status

approved