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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

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

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

Adjacent sequences:  A250155 A250156 A250157 * A250159 A250160 A250161

KEYWORD

nonn

AUTHOR

R. H. Hardin, Nov 13 2014

STATUS

approved

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Last modified October 17 05:00 EDT 2021. Contains 348048 sequences. (Running on oeis4.)