A244783 Number of length n 0..3 arrays with each partial sum starting from the beginning no more than one standard deviation from its mean.

2, 6, 20, 72, 268, 876, 3236, 12284, 42396, 159876, 614936, 2198628, 8407796, 32629532, 119560228, 461654712, 1803031416, 6724605836, 26147874800, 102596362036, 387701367548, 1515422726468, 5694815620420, 22229878552752

Offset

1,1

Comments

Column 3 of A244788

Links

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

Example

Some solutions for n=10
..2....2....2....2....2....2....2....2....1....2....2....2....2....1....2....2
..2....1....0....0....1....0....0....0....2....1....0....2....2....2....2....2
..1....0....2....3....0....1....1....2....0....3....2....2....0....0....0....2
..1....1....0....1....2....3....2....2....1....0....0....2....2....2....2....0
..1....1....3....3....3....0....1....3....1....2....2....1....2....3....1....1
..0....3....2....0....1....1....1....1....3....3....3....2....2....2....0....2
..2....3....0....1....1....2....3....0....1....2....0....1....3....0....3....3
..1....0....1....2....0....2....1....1....2....0....2....1....2....2....3....0
..2....1....2....0....3....1....0....2....3....1....2....0....1....3....0....2
..0....0....2....1....1....3....2....2....3....0....1....2....0....0....1....2

Crossrefs

Sequence in context: A150131 A150132 A150133 * A216837 A192658 A049141

Adjacent sequences: A244780 A244781 A244782 * A244784 A244785 A244786

Keyword

nonn

Author

R. H. Hardin, Jul 06 2014

Status

approved