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A250158 Number of length 4+6 0..n arrays with every seven consecutive terms having the maximum of some two terms equal to the minimum of the remaining five terms 1
654, 20513, 240144, 1611449, 7601062, 28153337, 87461488, 237724881, 581746318, 1307985393, 2742532640, 5423404233, 10203578438, 18390302857, 31929395744, 53644545313, 87542977998, 139200320065, 216239016816, 328916299865 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Row 4 of A250154
LINKS
FORMULA
Empirical: a(n) = (5/21)*n^9 + (127/21)*n^8 + (251/7)*n^7 + (911/10)*n^6 + (684/5)*n^5 + (325/2)*n^4 + (3047/21)*n^3 + (6967/105)*n^2 + (946/105)*n + 1
EXAMPLE
Some solutions for n=2
..2....2....2....2....1....0....1....0....1....0....2....1....2....0....1....1
..1....1....0....1....2....2....2....1....2....2....1....1....2....2....2....1
..0....1....0....2....0....1....1....2....0....0....0....2....2....1....0....0
..2....1....0....0....1....1....1....2....0....1....0....0....2....0....2....1
..1....1....2....1....0....1....1....0....2....0....2....2....0....0....2....0
..1....1....2....0....0....1....2....0....2....0....1....0....0....1....1....0
..1....2....2....0....0....2....2....0....0....0....0....0....0....0....1....0
..1....2....1....2....1....2....0....0....0....1....2....0....0....0....2....0
..2....2....0....0....2....2....2....2....0....2....0....2....2....1....1....0
..1....1....0....0....2....2....2....2....0....0....1....2....0....1....0....2
CROSSREFS
Sequence in context: A255208 A060520 A250701 * A265737 A065759 A280445
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 13 2014
STATUS
approved

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Last modified July 25 08:47 EDT 2024. Contains 374587 sequences. (Running on oeis4.)