A004220 a(n) = 10*log_10(n) rounded to the nearest integer.

0, 3, 5, 6, 7, 8, 8, 9, 10, 10, 10, 11, 11, 11, 12, 12, 12, 13, 13, 13, 13, 13, 14, 14, 14, 14, 14, 14, 15, 15, 15, 15, 15, 15, 15, 16, 16, 16, 16, 16, 16, 16, 16, 16, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 18

Offset

1,2

Links

Table of n, a(n) for n=1..57.

Mathematica

Round[10 Log10[Range[60]]] (* Harvey P. Dale, Sep 06 2021 *)

Crossrefs

Sequence in context: A196778 A195770 A196008 * A202308 A079058 A036496

Adjacent sequences: A004217 A004218 A004219 * A004221 A004222 A004223

Keyword

nonn

Author

N. J. A. Sloane

Status

approved