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A243603
Number of length n+2 0..6 arrays with no three elements in a row with pattern aba (with a!=b) and new values 0..6 introduced in 0..6 order
1
4, 10, 29, 97, 366, 1533, 7020, 34631, 181391, 995139, 5651157, 32902123, 194971159, 1169639664, 7076433285, 43062727014, 263096669677, 1611790269519, 9892521309824, 60793268309048, 373921041602730, 2301237378396793
OFFSET
1,1
COMMENTS
Column 6 of A243607
LINKS
FORMULA
Empirical: a(n) = 17*a(n-1) -106*a(n-2) +286*a(n-3) -245*a(n-4) -231*a(n-5) +329*a(n-6) +147*a(n-7) -106*a(n-8) -74*a(n-9) -15*a(n-10) -a(n-11)
EXAMPLE
Some solutions for n=5
..0....0....0....0....0....0....0....0....0....0....0....0....0....0....0....0
..1....1....1....0....1....1....1....1....1....1....1....1....1....0....1....0
..2....2....2....1....2....2....2....2....1....2....1....2....1....1....2....1
..2....2....0....2....3....3....2....3....2....2....2....3....1....1....3....1
..2....0....0....3....0....0....1....1....3....3....0....4....2....2....3....2
..3....0....3....3....2....4....3....4....3....4....0....4....0....3....4....3
..3....0....4....4....2....5....3....4....2....0....2....1....1....4....5....1
CROSSREFS
Sequence in context: A152808 A243601 A243602 * A243604 A243605 A243606
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jun 07 2014
STATUS
approved