A206979 Number of 7Xn 0..3 arrays avoiding the pattern z-1 z-1 z in any row, column, nw-to-se diagonal or ne-to-sw antidiagonal

12747, 162486009, 964232197214, 5637076828393230, 33450230674269584063

Offset

1,1

Comments

Row 7 of A206974

Links

Table of n, a(n) for n=1..5.

Example

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

Crossrefs

Sequence in context: A254514 A254814 A275158 * A206973 A206576 A207581

Adjacent sequences: A206976 A206977 A206978 * A206980 A206981 A206982

Keyword

nonn

Author

R. H. Hardin Feb 14 2012

Status

approved