1,2

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

a(2) = 6 because 10log(2) = 6.9314718...

a(3) = 10 because 10log(3) = 10.986122886681...

a(4) = 13 because 10log(4) = 13.8629436111989...

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

Cf. A004219.

Sequence in context: A213428 A006187 A288222 * A121149 A315140 A315141

Adjacent sequences: A004231 A004232 A004233 * A004235 A004236 A004237

nonn,easy

N. J. A. Sloane.

More terms Alonso del Arte, Dec 24 2013

approved