A229678 Number of defective 3-colorings of an n X n 0..2 array connected diagonally and antidiagonally with exactly two mistakes, and colors introduced in row-major 0..2 order.

0, 2, 888, 186576, 58038768, 33555543408, 39647663129952, 100358466494032656, 559874175467657854896, 7007180500895781669589584

Offset

1,2

Comments

Diagonal of A229685.

Links

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

Example

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

Crossrefs

Sequence in context: A239149 A050247 A159705 * A261528 A265881 A203609

Adjacent sequences: A229675 A229676 A229677 * A229679 A229680 A229681

Keyword

nonn,more

Author

R. H. Hardin, Sep 27 2013

Status

approved