A207282 Number of nX7 0..3 arrays avoiding the patterns z z+1 z or z z-1 z in any row, column, diagonal or antidiagonal

10686, 114190596, 268686202446, 895547972671398, 2920423120381462040

Offset

1,1

Comments

Column 7 of A207283

Links

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

Example

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

Crossrefs

Sequence in context: A257421 A257428 A254237 * A207478 A207534 A238067

Adjacent sequences: A207279 A207280 A207281 * A207283 A207284 A207285

Keyword

nonn

Author

R. H. Hardin Feb 16 2012

Status

approved