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A274747 Number of nX6 0..2 arrays with no element equal to any value at offset (-1,-2) (0,-1) or (-1,0) and new values introduced in order 0..2. 1
16, 164, 2017, 25585, 327123, 4190533, 53680592, 687685512, 8809672678, 112857546696, 1445776873145, 18521322045287, 237269920345659, 3039578666135430, 38938936908037372, 498832560169009277 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Column 6 of A274749.
LINKS
FORMULA
Empirical: a(n) = 14*a(n-1) -10*a(n-2) -80*a(n-3) +177*a(n-4) -152*a(n-5) +56*a(n-6) -a(n-7) -5*a(n-8) +a(n-9) for n>11
EXAMPLE
Some solutions for n=4
..0..1..2..1..0..2. .0..1..2..1..0..1. .0..1..2..1..2..1. .0..1..0..1..0..1
..1..0..1..0..1..0. .1..0..1..0..1..0. .1..2..1..2..1..2. .1..0..1..2..1..2
..0..1..0..2..0..2. .0..1..2..1..0..2. .2..0..2..1..0..1. .0..1..2..1..0..1
..2..0..1..0..2..1. .2..0..1..0..1..0. .0..2..0..2..1..0. .1..2..1..0..1..0
CROSSREFS
Cf. A274749.
Sequence in context: A138407 A094857 A274801 * A204031 A341084 A025930
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jul 04 2016
STATUS
approved

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Last modified March 29 03:51 EDT 2024. Contains 371264 sequences. (Running on oeis4.)