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A229589 Number of defective 3-colorings of a 4 X n 0..2 array connected horizontally and antidiagonally with exactly one mistake, and colors introduced in row-major 0..2 order. 1
0, 224, 2160, 19764, 167364, 1375152, 11035044, 87040260, 677327004, 5213798784, 39777273072, 301217858676, 2266655495148, 16964398022220, 126372108661164, 937513290523896, 6929886363153768, 51058923535878660, 375112065125492964 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
COMMENTS
Row 4 of A229586.
LINKS
FORMULA
Empirical: a(n) = 18*a(n-1) - 111*a(n-2) + 282*a(n-3) - 333*a(n-4) + 180*a(n-5) - 36*a(n-6) for n > 12.
EXAMPLE
Some solutions for n=3:
0 1 0 0 0 1 0 1 0 0 1 0 0 1 0 0 1 2 0 0 1
2 2 1 2 0 1 2 2 0 2 2 1 0 2 2 2 0 2 1 0 2
1 0 1 1 2 1 0 2 1 0 2 0 0 1 2 1 0 1 2 1 2
2 0 2 0 2 0 0 2 1 0 2 0 2 0 2 2 2 0 0 1 0
CROSSREFS
Cf. A229586.
Sequence in context: A233869 A146745 A015048 * A341048 A232804 A032802
KEYWORD
nonn
AUTHOR
R. H. Hardin, Sep 26 2013
STATUS
approved

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Last modified May 28 15:12 EDT 2024. Contains 372916 sequences. (Running on oeis4.)