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A229634 Number of defective 3-colorings of an nX5 0..2 array connected horizontally, diagonally and antidiagonally with exactly two mistakes, and colors introduced in row-major 0..2 order 1
12, 488, 6031, 77620, 960325, 11485716, 133784624, 1525870912, 17108056051, 189113977298, 2065634425127, 22332806237194, 239326746885334, 2544956244990312, 26878587507519977, 282161860575964390 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 5 of A229637

LINKS

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

FORMULA

Empirical: a(n) = 42*a(n-1) -723*a(n-2) +6569*a(n-3) -33687*a(n-4) +94839*a(n-5) -116010*a(n-6) -55215*a(n-7) +305043*a(n-8) -230994*a(n-9) -118011*a(n-10) +243513*a(n-11) -84933*a(n-12) -40719*a(n-13) +42804*a(n-14) -14887*a(n-15) +2598*a(n-16) -228*a(n-17) +8*a(n-18) for n>20

EXAMPLE

Some solutions for n=3

..0..1..2..2..0....0..1..0..1..0....0..1..2..1..0....0..1..2..0..2

..0..1..2..1..0....2..1..2..1..0....0..1..2..0..2....0..1..0..1..0

..0..1..2..1..2....2..0..2..0..0....2..0..2..0..2....0..2..0..1..0

CROSSREFS

Sequence in context: A012394 A012686 A012466 * A196704 A175322 A297651

Adjacent sequences:  A229631 A229632 A229633 * A229635 A229636 A229637

KEYWORD

nonn

AUTHOR

R. H. Hardin Sep 27 2013

STATUS

approved

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Last modified January 19 20:41 EST 2020. Contains 331066 sequences. (Running on oeis4.)