A249887 Number of length 4+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, 4019, 118638, 1599494, 12991337, 74439217, 331379292, 1219778604, 3872511183, 10923962159, 27981170954, 66148387890, 146141454485, 304712555117, 604328255416, 1147307969496, 2095939712763, 3700448828331

Offset

1,1

Comments

Row 4 of A249883

Links

R. H. Hardin, Table of n, a(n) for n = 1..52

Formula

Empirical: a(n) = n^10 + (37/105)*n^9 + (363/70)*n^8 + (442/105)*n^7 + (917/90)*n^6 + (211/30)*n^5 + (149/90)*n^4 + (407/70)*n^3 - (167/315)*n^2 + (19/210)*n

Example

Some solutions for n=3
..0....0....3....1....0....1....0....2....2....1....2....1....3....1....1....1
..1....2....1....0....1....0....0....2....1....1....1....0....0....3....0....2
..2....3....1....3....2....2....3....0....0....3....2....3....2....0....1....2
..3....1....3....0....0....3....1....2....0....0....0....2....0....3....3....1
..3....3....1....2....1....1....3....1....0....0....1....2....3....3....0....3
..1....0....2....0....3....3....2....0....2....0....3....3....2....3....3....2
..3....0....2....1....0....3....0....3....1....1....3....0....1....1....0....0
..3....2....2....2....0....0....0....0....2....1....3....0....0....0....1....1
..0....2....1....3....1....3....2....2....2....2....0....1....3....3....0....2
..1....2....1....3....1....1....0....2....0....2....3....2....0....1....3....2

Crossrefs

Sequence in context: A201725 A202578 A213404 * A210314 A294851 A266053

Adjacent sequences: A249884 A249885 A249886 * A249888 A249889 A249890

Keyword

nonn

Author

R. H. Hardin, Nov 07 2014

Status

approved