A250087 Number of length 6+5 0..n arrays with every six consecutive terms having the maximum of some two terms equal to the minimum of the remaining four terms

774, 25659, 315376, 2170435, 10384566, 38804209, 121263104, 330977421, 812445670, 1830978831, 3846189744, 7617096799, 14347945366, 25885421205, 44979623296, 75622979129, 123483223494, 196448622211, 305305805040

Offset

1,1

Comments

Row 6 of A250081

Links

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

Formula

Empirical: a(n) = (85/252)*n^9 + (1445/168)*n^8 + (347/7)*n^7 + (361/3)*n^6 + (631/4)*n^5 + (3775/24)*n^4 + (9602/63)*n^3 + (8381/84)*n^2 + (377/14)*n + 1

Example

Some solutions for n=2
..2....2....0....2....1....2....2....1....1....0....2....1....1....2....1....1
..1....0....1....0....1....1....1....0....2....2....0....0....1....2....2....0
..0....1....1....1....0....1....1....2....0....1....0....2....0....1....1....0
..1....0....0....1....0....1....0....2....0....0....0....2....1....0....2....1
..0....1....0....1....2....1....0....1....1....1....0....0....1....0....0....1
..0....0....1....1....0....0....0....1....0....0....2....0....1....0....2....0
..2....0....0....2....1....1....0....1....2....0....0....0....1....0....1....2
..2....0....2....2....0....2....2....1....1....1....0....2....1....0....1....0
..0....0....2....2....2....2....1....0....0....0....0....2....0....1....1....0
..0....0....0....0....0....2....2....2....0....0....1....0....2....0....1....0
..1....2....0....1....2....1....0....1....2....2....2....0....1....1....2....0

Crossrefs

Sequence in context: A255156 A365597 A233991 * A252673 A077077 A177845

Adjacent sequences: A250084 A250085 A250086 * A250088 A250089 A250090

Keyword

nonn

Author

R. H. Hardin, Nov 11 2014

Status

approved