A004429 Geometric mean of digits of n (rounded to nearest integer).

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

Offset: 0

Author

N. J. A. Sloane

Keywords

• nonn
• base

Crossrefs

Cf. A004428, A007954, A257830.

Programs

PARI

A004429(n)=round(sqrtn(prod(i=1,#n=digits(n),n[i]),#n)) \\ M. F. Hasler, May 10 2015