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A246477 Number of length n+3 0..6 arrays with no pair in any consecutive four terms totaling exactly 6. 1
966, 4386, 20004, 91212, 415650, 1893780, 8628792, 39320988, 179184654, 816514170, 3720653346, 16954232310, 77257406100, 352048294158, 1604217270528, 7310107829838, 33310766859666, 151790888076216, 691682436483000 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Column 6 of A246479.
LINKS
FORMULA
Empirical: a(n) = 3*a(n-1) +2*a(n-2) +3*a(n-3) +77*a(n-4) +55*a(n-5) +59*a(n-6) +18*a(n-7) +a(n-8) +4*a(n-9) +a(n-10).
EXAMPLE
Some solutions for n=4
..1....1....5....2....0....1....5....0....3....0....6....4....3....5....1....2
..0....4....5....0....0....1....4....0....2....5....3....5....1....5....1....1
..1....0....3....3....1....2....4....1....1....2....5....5....4....4....3....2
..2....4....5....5....3....0....6....0....1....2....5....4....1....6....1....6
..2....0....0....2....4....2....3....4....1....3....2....5....6....6....2....2
..3....4....5....5....6....5....5....0....3....5....0....3....1....6....0....6
..5....0....2....0....1....3....5....5....1....5....2....5....6....3....3....1
CROSSREFS
Cf. A246479.
Sequence in context: A260291 A251232 A202049 * A064258 A142378 A035887
KEYWORD
nonn
AUTHOR
R. H. Hardin, Aug 27 2014
STATUS
approved

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Last modified July 22 10:58 EDT 2024. Contains 374490 sequences. (Running on oeis4.)