A229592 Number of defective 3-colorings of a 7 X n 0..2 array connected horizontally and antidiagonally with exactly one mistake, and colors introduced in row-major 0..2 order.

0, 26624, 839808, 25745364, 752194836, 21639043284, 613195191972, 17182547751528, 476829713920572, 13124502841956912, 358700511256861500, 9743787862523085312, 263278493550185520600, 7080841230759146337948

Offset: 1

Author

R. H. Hardin, Sep 26 2013

Keywords

• nonn

Comments

Row 7 of A229586.

Examples

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

Links

• R. H. Hardin, Table of n, a(n) for n = 1..210
• R. H. Hardin, Empirical recurrence of order 54

Crossrefs

Cf. A229586.

Formula

Empirical recurrence of order 54 (see link above).