A004234 a(n) = floor(10*log(n)).

0, 6, 10, 13, 16, 17, 19, 20, 21, 23, 23, 24, 25, 26, 27, 27, 28, 28, 29, 29, 30, 30, 31, 31, 32, 32, 32, 33, 33, 34, 34, 34, 34, 35, 35, 35, 36, 36, 36, 36, 37, 37, 37, 37, 38, 38, 38, 38, 38, 39, 39, 39, 39, 39, 40, 40, 40, 40, 40, 40, 41, 41, 41, 41, 41, 41

Offset: 1

Author

N. J. A. Sloane

Keywords

• nonn
• easy

Examples

			a(2) = 6  because 10*log(2) =  6.9314718...
a(3) = 10 because 10*log(3) = 10.9861228...
a(4) = 13 because 10*log(4) = 13.8629436...
		

Links

• Vincenzo Librandi, Table of n, a(n) for n = 1..10000

Crossrefs

Cf. A004219.

Programs

Mathematica

Table[Floor[10Log[n]], {n, 75}] (* Alonso del Arte, Dec 24 2013 *)

Extensions

More terms from Alonso del Arte, Dec 24 2013