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A229585 Number of defective 3-colorings of an n X 7 0..2 array connected horizontally and antidiagonally with exactly one mistake, and colors introduced in row-major 0..2 order. 1
96, 5724, 264300, 11035044, 435326724, 16551428868, 613195191972, 22285439501940, 798023885879412, 28242628279003332, 990013172442084324, 34429588531063458516, 1189375483329032617620, 40853134231990887545316 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 7 of A229586.

LINKS

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

FORMULA

Empirical: a(n) = 84*a(n-1) - 2466*a(n-2) + 31428*a(n-3) - 206469*a(n-4) + 750384*a(n-5) - 1513404*a(n-6) + 1574640*a(n-7) - 656100*a(n-8).

EXAMPLE

Some solutions for n=3:

  0 1 2 0 1 0 2      0 1 0 2 1 2 1      0 1 2 0 1 0 1

  0 1 2 0 2 1 0      0 1 0 2 1 2 1      0 1 2 0 1 0 1

  2 1 2 1 2 1 1      0 2 0 2 1 2 2      0 2 1 0 2 0 2

CROSSREFS

Cf. A229586.

Sequence in context: A017759 A251159 A004392 * A093296 A093248 A299856

Adjacent sequences:  A229582 A229583 A229584 * A229586 A229587 A229588

KEYWORD

nonn

AUTHOR

R. H. Hardin, Sep 26 2013

STATUS

approved

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Last modified January 25 02:37 EST 2022. Contains 350565 sequences. (Running on oeis4.)