A244827 Number of length n 0..3 arrays with each partial sum starting from the beginning no more than two standard deviations from its mean.

4, 16, 62, 242, 950, 3744, 14802, 58662, 232916, 926120, 3628422, 14381528, 57148222, 227453736, 906239638, 3576510068, 14222021944, 56647350200, 225861048608, 901148151936, 3573218491998, 14238032956598, 56794010648340

Offset

1,1

Comments

Column 3 of A244832.

Links

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

Example

Some solutions for n=8
..3....3....3....1....3....1....1....3....2....1....3....2....0....3....3....1
..2....1....0....0....1....2....1....0....3....1....1....2....2....0....0....3
..2....3....3....2....3....0....1....1....2....0....1....1....0....1....2....2
..2....2....3....1....0....1....2....3....1....1....3....1....3....2....0....3
..1....3....3....1....1....0....0....2....3....0....2....2....3....0....3....0
..1....1....2....0....1....2....0....3....0....1....0....2....2....0....0....2
..2....2....2....3....1....2....1....3....0....3....3....1....1....0....3....2
..1....3....2....3....1....3....1....2....3....1....1....2....1....0....0....3

Crossrefs

Cf. A244832.

Sequence in context: A171278 A227438 A206839 * A169760 A222699 A034542

Adjacent sequences: A244824 A244825 A244826 * A244828 A244829 A244830

Keyword

nonn

Author

R. H. Hardin, Jul 06 2014

Status

approved