A004430 Geometric mean of digits of n (rounded up).

0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 0, 1, 2, 2, 2, 3, 3, 3, 3, 3, 0, 2, 2, 3, 3, 4, 4, 4, 4, 5, 0, 2, 3, 3, 4, 4, 5, 5, 5, 6, 0, 2, 3, 4, 4, 5, 5, 6, 6, 6, 0, 3, 4, 4, 5, 5, 6, 6, 7, 7, 0, 3, 4, 5, 5, 6, 6, 7, 7, 8, 0, 3, 4, 5, 6, 6, 7, 7, 8, 8, 0, 3, 4, 5, 6, 7, 7, 8, 8, 9, 0, 3, 5, 6, 6, 7, 8, 8, 9, 9, 0, 0, 0, 0, 0, 0, 0, 0

Offset

0,3

Links

Table of n, a(n) for n=0..107.

Mathematica

Ceiling[GeometricMean/@IntegerDigits[Range[0, 110]]] (* Harvey P. Dale, Jun 21 2011 *)

Crossrefs

Sequence in context: A004426 A262188 A358647 * A285094 A134778 A118943

Adjacent sequences: A004427 A004428 A004429 * A004431 A004432 A004433

Keyword

nonn,base

Author

N. J. A. Sloane

Status

approved