The OEIS is supported by the many generous donors to the OEIS Foundation. Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A309359 Median of the primes p with 2^(n-1) < p < 2^n. 4
 6, 12, 23, 47, 97, 191, 383, 761, 1523, 3049, 6107, 12252, 24376, 48877, 97777, 195659, 391623, 783257, 1566386, 3133974, 6269116, 12538053, 25082361, 50170976, 100353498, 200730129, 401498897, 803081460, 1606292647, 3212862108 (list; graph; refs; listen; history; text; internal format)
 OFFSET 3,1 COMMENTS For n >= 3, median of the primes with n binary digits. The median of an even number of values is assumed to be defined as the arithmetic mean of the two central elements in their sorted list. The special case of the primes with two binary digits {2, 3} is excluded, because their median would be 5/2. LINKS Hugo Pfoertner, Table of n, a(n) for n = 3..63 EXAMPLE a(3) = 6: 2^2 < {5, 7} < 2^3, (5 + 7)/2 = 6. a(4) = 12: 2^3 < {11, 13} < 2^4, (11 + 13)/2 = 12 a(5) = 23: 2^4 < {17, 19, 23, 29, 31} < 2^5, median = 23. CROSSREFS Cf. A007053, A036378, A309329. Sequence in context: A078472 A192754 A005694 * A172079 A081512 A096387 Adjacent sequences: A309356 A309357 A309358 * A309360 A309361 A309362 KEYWORD nonn AUTHOR Hugo Pfoertner, Jul 25 2019 STATUS approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified February 7 07:00 EST 2023. Contains 360112 sequences. (Running on oeis4.)