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A229635 Number of defective 3-colorings of an nX6 0..2 array connected horizontally, diagonally and antidiagonally with exactly two mistakes, and colors introduced in row-major 0..2 order 1
40, 1608, 28448, 535671, 9722206, 170405645, 2902520386, 48303362606, 788657935296, 12673198849045, 200926746561814, 3149086238797127, 48865266229013882, 751678393470169836, 11474405764402402524 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 6 of A229637

LINKS

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

FORMULA

Empirical: a(n) = 54*a(n-1) -1140*a(n-2) +11637*a(n-3) -54252*a(n-4) +33192*a(n-5) +658756*a(n-6) -1921212*a(n-7) -1566516*a(n-8) +12850374*a(n-9) -7108644*a(n-10) -35018232*a(n-11) +43506046*a(n-12) +38500440*a(n-13) -85687812*a(n-14) -200796*a(n-15) +75241308*a(n-16) -31685592*a(n-17) -25769200*a(n-18) +20878068*a(n-19) +213348*a(n-20) -3655770*a(n-21) +608916*a(n-22) +230904*a(n-23) -61761*a(n-24) -2790*a(n-25) +1800*a(n-26) -125*a(n-27) for n>30

EXAMPLE

Some solutions for n=3

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

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

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

CROSSREFS

Sequence in context: A208082 A009984 A041761 * A278431 A229584 A140702

Adjacent sequences:  A229632 A229633 A229634 * A229636 A229637 A229638

KEYWORD

nonn

AUTHOR

R. H. Hardin Sep 27 2013

STATUS

approved

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Last modified December 6 04:14 EST 2019. Contains 329784 sequences. (Running on oeis4.)