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A212827 Number of 0..6 arrays of length n with no adjacent pair equal to its immediately preceding adjacent pair, and new values introduced in 0..6 order 1
1, 2, 5, 13, 44, 168, 717, 3359, 17055, 92749, 534071, 3220152, 20122695, 129180223, 845868450, 5618381653, 37699577379, 254789247816, 1730682217663, 11797467544723, 80618379435810, 551861368167305, 3782253874750807 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Column 6 of A212829

LINKS

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

FORMULA

Empirical: a(n) = 16*a(n-1) -79*a(n-2) +70*a(n-3) +361*a(n-4) -372*a(n-5) -964*a(n-6) +144*a(n-7) +1116*a(n-8) +720*a(n-9) +144*a(n-10) for n>13

EXAMPLE

Some solutions for n=8

..0....0....0....0....0....0....0....0....0....0....0....0....0....0....0....0

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

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

..3....3....2....0....0....3....2....1....1....3....1....0....2....0....2....2

..3....3....1....0....1....3....1....2....3....2....0....0....3....3....1....3

..0....2....2....1....1....3....2....2....3....4....3....2....4....0....3....2

..4....2....3....1....2....4....2....0....2....1....4....3....3....1....0....1

..0....4....3....3....2....2....2....0....1....2....5....4....5....3....3....3

CROSSREFS

Sequence in context: A066740 A212825 A212826 * A212828 A212830 A000719

Adjacent sequences:  A212824 A212825 A212826 * A212828 A212829 A212830

KEYWORD

nonn

AUTHOR

R. H. Hardin May 28 2012

STATUS

approved

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Last modified December 12 17:50 EST 2019. Contains 329960 sequences. (Running on oeis4.)