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A229641 Number of defective 3-colorings of a 5Xn 0..2 array connected horizontally, diagonally and antidiagonally with exactly two mistakes, and colors introduced in row-major 0..2 order 1
0, 925, 8800, 89331, 960325, 9722206, 98015235, 960209886, 9295982009, 88583128280, 835152387679, 7790969750780, 72061578435025, 661325695334298, 6028108188010041, 54611818274641520, 492062341420006203 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Row 5 of A229637

LINKS

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

FORMULA

Empirical: a(n) = 18*a(n-1) -15*a(n-2) -1191*a(n-3) +3468*a(n-4) +31983*a(n-5) -108707*a(n-6) -424479*a(n-7) +1614489*a(n-8) +2851598*a(n-9) -13478352*a(n-10) -7797810*a(n-11) +66347438*a(n-12) -12632640*a(n-13) -190067859*a(n-14) +147888798*a(n-15) +287096430*a(n-16) -412178619*a(n-17) -138135927*a(n-18) +522690894*a(n-19) -168525432*a(n-20) -273411640*a(n-21) +227616084*a(n-22) +9610272*a(n-23) -73617984*a(n-24) +21460464*a(n-25) +7359984*a(n-26) -4611168*a(n-27) +186624*a(n-28) +279936*a(n-29) -46656*a(n-30) for n>33

EXAMPLE

Some solutions for n=3

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

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

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

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

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

CROSSREFS

Sequence in context: A325141 A244169 A245791 * A147548 A116989 A152503

Adjacent sequences:  A229638 A229639 A229640 * A229642 A229643 A229644

KEYWORD

nonn

AUTHOR

R. H. Hardin Sep 27 2013

STATUS

approved

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Last modified February 26 03:09 EST 2020. Contains 332272 sequences. (Running on oeis4.)