A249888 Number of length 5+6 0..n arrays with no seven consecutive terms having the maximum of any three terms equal to the minimum of the remaining four terms

35, 6949, 304782, 5545760, 57148261, 398306829, 2092722780, 8889679512, 32011951095, 101036799677, 286381457098, 742370386056, 1784769580217, 4023380411605, 8579189205048, 17427105867792, 33919972498827

Offset

1,1

Comments

Row 5 of A249883

Links

R. H. Hardin, Table of n, a(n) for n = 1..31

Formula

Empirical: a(n) = n^11 - (47/84)*n^10 + (2048/315)*n^9 - (67/840)*n^8 + (8513/630)*n^7 + (29/10)*n^6 + (493/180)*n^5 + (3729/280)*n^4 - (9571/1260)*n^3 + (269/140)*n^2 + (47/35)*n

Example

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

Crossrefs

Sequence in context: A210268 A025036 A224126 * A212025 A316940 A202066

Adjacent sequences: A249885 A249886 A249887 * A249889 A249890 A249891

Keyword

nonn

Author

R. H. Hardin, Nov 07 2014

Status

approved