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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.
1
0, 79872, 4377888, 175867605, 6279934941, 210095323918, 6749642728251, 210585483358218, 6425394969210939, 192588353994919005, 5688456451099770177, 165962586614349710061, 4791398443494607293804, 137079252918696683881476
OFFSET
1,2
COMMENTS
Row 7 of A229694.
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
KEYWORD
nonn
AUTHOR
R. H. Hardin, Sep 27 2013
STATUS
approved