A229700 Number of defective 3-colorings of a 7 X n 0..2 array connected horizontally and antidiagonally with exactly two mistakes, and colors introduced in row-major 0..2 order.

0, 79872, 4377888, 175867605, 6279934941, 210095323918, 6749642728251, 210585483358218, 6425394969210939, 192588353994919005, 5688456451099770177, 165962586614349710061, 4791398443494607293804, 137079252918696683881476

Offset

1,2

Comments

Row 7 of A229694.

Links

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

R. H. Hardin, Empirical recurrence of order 86

Formula

Empirical recurrence of order 86 (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
  0 1 0   0 1 0   0 1 0   0 1 0   0 0 1   0 0 1   0 1 0
  0 2 0   0 1 0   0 1 0   0 2 0   1 0 2   2 0 2   0 1 0
  0 1 1   0 1 0   0 1 0   0 2 1   2 0 1   1 0 2   0 1 1
  2 0 2   1 2 1   2 2 0   0 2 0   1 2 0   1 0 2   2 1 2
  1 2 1   0 1 0   1 1 2   0 2 2   0 2 1   1 0 1   0 1 2
  1 0 2   0 1 2   2 0 2   0 2 0   1 0 1   1 0 1   2 0 2

Crossrefs

Sequence in context: A146324 A185473 A235075 * A112785 A106775 A258951

Adjacent sequences: A229697 A229698 A229699 * A229701 A229702 A229703

Keyword

nonn

Author

R. H. Hardin, Sep 27 2013

Status

approved