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

20, 5102, 246560, 4732480, 50383892, 358850926, 1914587120, 8226417240, 29886098100, 94991593334, 270790229072, 705292752008, 1702428675220, 3850911187910, 8235751257376, 16772740216208, 32720682872916

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