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A229684
Number of defective 3-colorings of an n X 7 0..2 array connected diagonally and antidiagonally with exactly two mistakes, and colors introduced in row-major 0..2 order.
1
0, 101376, 7952256, 437924880, 21063718224, 937213830720, 39647663129952, 1617006498774912, 64143524707305984, 2489243835565159488, 94897266574306915296, 3564781098414437505600, 132254323024723203273120
OFFSET
1,2
COMMENTS
Column 7 of A229685.
FORMULA
Empirical recurrence of order 46 (see link above).
EXAMPLE
Some solutions for n=3:
0 0 1 1 1 0 1 0 0 1 0 1 0 1 0 1 1 2 1 2 1
1 0 2 0 2 0 1 2 0 1 0 1 0 1 2 0 0 0 0 0 0
0 0 1 0 2 0 1 2 2 2 0 1 2 2 2 1 1 1 2 1 0
CROSSREFS
Sequence in context: A354566 A251959 A250631 * A187642 A023077 A077760
KEYWORD
nonn
AUTHOR
R. H. Hardin, Sep 27 2013
STATUS
approved