A004224 a(n) = 100*log_10(n) rounded up.

0, 31, 48, 61, 70, 78, 85, 91, 96, 100, 105, 108, 112, 115, 118, 121, 124, 126, 128, 131, 133, 135, 137, 139, 140, 142, 144, 145, 147, 148, 150, 151, 152, 154, 155, 156, 157, 158, 160, 161, 162, 163, 164, 165

Offset: 1

Author

N. J. A. Sloane

Keywords

• nonn

Crossrefs

Cf. A004222, A004223.

Cf. A004218, A004221, A004227, A004230.

Programs

Mathematica

Ceiling[100 Log10[Range[50]]] (* Harvey P. Dale, Jun 05 2021 *)