A229540 Number of defective 3-colorings of a 7 X n 0..2 array connected horizontally, diagonally and antidiagonally with exactly one mistake, and colors introduced in row-major 0..2 order.

0, 4212, 59626, 1379512, 26566266, 544403948, 10551803060, 205336122417, 3913347537410, 74172957575993, 1391260426025666, 25942784963976735, 480614597100202422, 8860662840757232528, 162602761260788194310

Offset

1,2

Comments

Row 7 of A229534.

Links

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

R. H. Hardin, Empirical recurrence of order 92

Formula

Empirical recurrence of order 92 (see link above).

Example

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

Crossrefs

Cf. A229534.

Sequence in context: A002241 A059005 A212613 * A250903 A250947 A291136

Adjacent sequences: A229537 A229538 A229539 * A229541 A229542 A229543

Keyword

nonn

Author

R. H. Hardin, Sep 25 2013

Status

approved