A388420 Geometric mean of the positive integers with n decimal digits, rounded to nearest integer.

4, 47, 475, 4751, 47513, 475134, 4751345, 47513456, 475134568, 4751345690

Offset

1,1

Links

Table of n, a(n) for n=1..10.

Formula

Limit_{n->oo} a(n)*exp(1)/10^(n+1/9) = 1.

Mathematica

a[n_]:=Round[GeometricMean[Range[10^(n-1), 10^n-1]]]; Array[a, 5] (* James C. McMahon, Sep 18 2025 *)

Crossrefs

Cf. A011278, A388419, A388422.

Sequence in context: A277654 A247767 A278267 * A309329 A354405 A326434

Adjacent sequences: A388417 A388418 A388419 * A388421 A388422 A388423

Keyword

nonn,base,more

Author

Hugo Pfoertner, Sep 18 2025

Status

approved