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A229698 Number of defective 3-colorings of a 5Xn 0..2 array connected horizontally and antidiagonally with exactly two mistakes, and colors introduced in row-major 0..2 order 1
0, 2304, 62856, 1125333, 17724789, 258006388, 3583403667, 48115029568, 629879095575, 8082470014816, 102040738816275, 1270988929203520, 15651508367076687, 190863964416217648, 2307849686574725259 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Row 5 of A229694

LINKS

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

FORMULA

Empirical: a(n) = 48*a(n-1) -960*a(n-2) +10468*a(n-3) -68685*a(n-4) +282276*a(n-5) -718624*a(n-6) +997536*a(n-7) -166467*a(n-8) -2005784*a(n-9) +3520224*a(n-10) -1956780*a(n-11) -1660207*a(n-12) +3547332*a(n-13) -2236608*a(n-14) -28632*a(n-15) +1014720*a(n-16) -774528*a(n-17) +307392*a(n-18) -71424*a(n-19) +9216*a(n-20) -512*a(n-21) for n>27

EXAMPLE

Some solutions for n=3

..0..1..0....0..1..0....0..1..0....0..0..1....0..0..1....0..1..0....0..1..0

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

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

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

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

CROSSREFS

Sequence in context: A187292 A235423 A235419 * A236280 A187194 A170785

Adjacent sequences:  A229695 A229696 A229697 * A229699 A229700 A229701

KEYWORD

nonn

AUTHOR

R. H. Hardin Sep 27 2013

STATUS

approved

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Last modified January 29 04:57 EST 2020. Contains 331335 sequences. (Running on oeis4.)