A004265 a(n) = floor(1000*log_2(n)).

0, 1000, 1584, 2000, 2321, 2584, 2807, 3000, 3169, 3321, 3459, 3584, 3700, 3807, 3906, 4000, 4087, 4169, 4247, 4321, 4392, 4459, 4523, 4584, 4643, 4700, 4754, 4807, 4857, 4906, 4954, 5000, 5044, 5087

Offset

1,2

Links

Robert Israel, Table of n, a(n) for n = 1..10000

Maple

seq(ilog2(n^1000), n=1..100); # Robert Israel, Aug 02 2019

Mathematica

Floor[1000*Log[2, Range[50]]] (* Harvey P. Dale, May 07 2013 *)

Prog

(Magma) [Floor(1000*Log(2, n)):n in [1..50]]; // Marius A. Burtea, Aug 02 2019

Crossrefs

Sequence in context: A145517 A342975 A027662 * A004266 A004267 A319441

Adjacent sequences: A004262 A004263 A004264 * A004266 A004267 A004268

Keyword

nonn

Author

N. J. A. Sloane

Status

approved