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A250020 Number of length 6+5 0..n arrays with no six consecutive terms having the maximum of any three terms equal to the minimum of the remaining three terms 1
20, 5102, 246560, 4732480, 50383892, 358850926, 1914587120, 8226417240, 29886098100, 94991593334, 270790229072, 705292752008, 1702428675220, 3850911187910, 8235751257376, 16772740216208, 32720682872916 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Row 6 of A250014

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..40

FORMULA

Empirical: a(n) = n^11 - (7/6)*n^10 + (3907/560)*n^9 - (1139/240)*n^8 + (41257/2520)*n^7 - (69/8)*n^6 + (6293/720)*n^5 + (863/80)*n^4 - (5944/315)*n^3 + (55/4)*n^2 - (443/105)*n

EXAMPLE

Some solutions for n=2

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

..2....0....0....0....2....0....2....0....0....2....2....2....0....2....0....2

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

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

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

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

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

..2....2....0....0....2....0....0....0....0....0....2....2....0....2....2....2

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

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

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

CROSSREFS

Sequence in context: A079759 A109894 A227765 * A088852 A123379 A175015

Adjacent sequences:  A250017 A250018 A250019 * A250021 A250022 A250023

KEYWORD

nonn

AUTHOR

R. H. Hardin, Nov 10 2014

STATUS

approved

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Last modified March 6 04:14 EST 2021. Contains 341841 sequences. (Running on oeis4.)