A229642 Number of defective 3-colorings of a 6 X n 0..2 array connected horizontally, diagonally and antidiagonally with exactly two mistakes, and colors introduced in row-major 0..2 order.

0, 3924, 50084, 747299, 11485716, 170405645, 2495874984, 35693194243, 503332240292, 6990933433009, 96001895136772, 1304362116389856, 17565879194817688, 234673938451844201, 3113368949256998744

Offset

1,2

Comments

Row 6 of A229637.

Links

R. H. Hardin, Table of n, a(n) for n = 1..210

R. H. Hardin, Empirical recurrence of order 69

Formula

Empirical recurrence of order 69 (see link above).

Example

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

Crossrefs

Sequence in context: A221239 A136459 A235315 * A266060 A034283 A335789

Adjacent sequences: A229639 A229640 A229641 * A229643 A229644 A229645

Keyword

nonn

Author

R. H. Hardin, Sep 27 2013

Status

approved