A229643 Number of defective 3-colorings of a 7 X n 0..2 array connected horizontally, diagonally and antidiagonally with exactly two mistakes, and colors introduced in row-major 0..2 order.

0, 15795, 277996, 6049298, 133784624, 2902520386, 61836040854, 1290897457785, 26533491049453, 537479161392127, 10758714918897447, 213067493458619915, 4181337838281995586, 81391742898664549466, 1573067212373296604298

Offset

1,2

Comments

Row 7 of A229637.

Links

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

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 0   0 1 2   0 1 2   0 1 2   2 1 0   0 1 0   0 1 2
  2 2 0   0 2 1   0 0 2   2 1 0   0 2 2   0 1 0   0 1 0
  0 1 0   1 2 0   2 1 2   1 2 0   0 1 0   2 1 2   0 2 0
  0 2 0   1 2 0   2 1 0   1 2 0   0 2 0   0 2 0   0 1 1
  0 1 0   0 2 0   0 1 0   1 2 1   0 2 1   1 2 1   0 1 2
  0 1 2   0 2 0   2 1 0   1 2 0   1 2 1   0 2 0   2 1 0

Crossrefs

Sequence in context: A235530 A116493 A061733 * A216180 A112450 A063847

Adjacent sequences: A229640 A229641 A229642 * A229644 A229645 A229646

Keyword

nonn

Author

R. H. Hardin, Sep 27 2013

Status

approved