A231042 Number of 6 X n 0..2 arrays x(i,j) with each element horizontally, diagonally or antidiagonally next to at least one element with value (x(i,j)+1) mod 3 and at least one element with value (x(i,j)-1) mod 3, and upper left element zero.

0, 12, 2988, 375620, 36327118, 10140483166, 1844073908022, 383056487876288, 74556370297711856, 14997676327239628696

Offset

1,2

Comments

Row 6 of A231037.

Links

Table of n, a(n) for n=1..10.

Example

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

Crossrefs

Cf. A231037.

Sequence in context: A028666 A103658 A271515 * A370300 A283831 A268008

Adjacent sequences: A231039 A231040 A231041 * A231043 A231044 A231045

Keyword

nonn

Author

R. H. Hardin, Nov 03 2013

Status

approved