A004266 a(n) = round(1000*log_2(n)).

0, 1000, 1585, 2000, 2322, 2585, 2807, 3000, 3170, 3322, 3459, 3585, 3700, 3807, 3907, 4000, 4087, 4170, 4248, 4322, 4392, 4459, 4524, 4585, 4644, 4700, 4755, 4807, 4858, 4907, 4954, 5000, 5044, 5087, 5129, 5170, 5209, 5248, 5285, 5322, 5358, 5392, 5426, 5459

Offset

1,2

Links

Marius A. Burtea, Table of n, a(n) for n = 1..1000

Mathematica

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

Prog

(PARI) a(n)=round(1000*lg(n)) \\ Charles R Greathouse IV, Jul 25 2012
(Magma) [Round(1000*Log(2, n)):n in [1..50]]; // Marius A. Burtea, Aug 02 2019

Crossrefs

Sequence in context: A342975 A027662 A004265 * A004267 A319441 A202456

Adjacent sequences: A004263 A004264 A004265 * A004267 A004268 A004269

Keyword

nonn,easy

Author

N. J. A. Sloane

Extensions

a(35)-a(44) from Charles R Greathouse IV, Jul 25 2012

Status

approved