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A229456 Number of defective 3-colorings of an n X 5 0..2 array connected horizontally and vertically with exactly one mistake and colors introduced in row-major 0..2 order. 1
16, 324, 4962, 68790, 903332, 11451686, 141595454, 1718447506, 20556781248, 243096369158, 2847922372290, 33104931317106, 382296017735388, 4389980739706374, 50166156571004678, 570836263990509842 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Column 5 of A229460.
LINKS
FORMULA
Empirical: a(n) = 32*a(n-1) -386*a(n-2) +2264*a(n-3) -7265*a(n-4) +13512*a(n-5) -14960*a(n-6) +9872*a(n-7) -3776*a(n-8) +768*a(n-9) -64*a(n-10).
EXAMPLE
Some solutions for n=3
..0..1..2..1..2....0..1..2..0..2....0..1..0..1..0....0..1..0..1..2
..2..2..1..2..1....2..1..0..1..0....1..2..1..2..1....2..2..1..2..0
..0..1..0..1..2....1..2..1..2..1....2..1..0..2..0....1..0..2..1..2
CROSSREFS
Cf. A229460.
Sequence in context: A274893 A275135 A276297 * A246876 A176128 A223394
KEYWORD
nonn
AUTHOR
R. H. Hardin, Sep 24 2013
STATUS
approved

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Last modified June 25 13:13 EDT 2024. Contains 373705 sequences. (Running on oeis4.)