A004222 a(n) = 100*log_10(n) rounded down.

0, 30, 47, 60, 69, 77, 84, 90, 95, 100, 104, 107, 111, 114, 117, 120, 123, 125, 127, 130, 132, 134, 136, 138, 139, 141, 143, 144, 146, 147, 149, 150, 151, 153, 154, 155, 156, 157, 159, 160, 161, 162, 163, 164

Offset: 1

Author

N. J. A. Sloane

Keywords

• nonn

Links

• Harvey P. Dale, Table of n, a(n) for n = 1..1000

Programs

Mathematica

Floor[100*Log[10,Range[50]]] (* Harvey P. Dale, May 12 2012 *)

Formula

a(n) = floor(100*log_10(n)). - Wesley Ivan Hurt, Mar 15 2023