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A215192
Number of arrays of 5 0..n integers with no sum of consecutive elements equal to a disjoint adjacent sum of an equal number of elements.
1
0, 30, 216, 954, 2940, 7404, 16092, 31560, 57072, 96990, 156588, 242502, 362496, 525972, 743652, 1028184, 1393740, 1856682, 2435112, 3149598, 4022640, 5079492, 6347544, 7857204, 9641232, 11735682, 14179152, 17013822, 20284620, 24040320
OFFSET
1,2
COMMENTS
Row 5 of A215190.
LINKS
FORMULA
Empirical: a(n) = 3*a(n-1) - a(n-2) - 4*a(n-3) + 2*a(n-4) + 2*a(n-5) + 2*a(n-6) - 4*a(n-7) - a(n-8) + 3*a(n-9) - a(n-10).
Empirical g.f.: 6*x^2*(5 + 21*x + 56*x^2 + 69*x^3 + 57*x^4 + 24*x^5 + 8*x^6) / ((1 - x)^6*(1 + x)^2*(1 + x + x^2)). - Colin Barker, Jul 22 2018
EXAMPLE
Some solutions for n=6:
..5....5....3....4....6....0....6....6....3....2....1....6....2....0....3....2
..6....3....2....1....4....4....1....5....1....6....5....1....1....1....2....6
..4....2....5....3....5....1....0....4....3....4....6....3....3....2....5....5
..1....1....2....0....0....5....2....1....2....3....4....2....2....0....1....2
..2....0....0....5....6....2....1....5....0....2....1....6....5....4....4....1
CROSSREFS
Cf. A215190.
Sequence in context: A178672 A061661 A042754 * A244836 A076389 A342896
KEYWORD
nonn
AUTHOR
R. H. Hardin, Aug 05 2012
STATUS
approved