The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A144137 Numbers n such that between n^K and (n+1)^K there are no primes, where K = sqrt(2). 2

%I

%S 4,24,29,33,40,43,56,59,84,117,122,128,132,139,145,156,162,163,183,

%T 190,203,230,253,257,286,297,303,306,315,319,336,371,403,420,433,447,

%U 456,467,479,537,543,563,592,595,599,624,699,746,755,767,774,782,805,814

%N Numbers n such that between n^K and (n+1)^K there are no primes, where K = sqrt(2).

%H T. D. Noe, <a href="/A144137/b144137.txt">Table of n, a(n) for n=1..133</a> (no other n < 10^6)

%e a(1)=4 because in range 4^sqrt(2) = 7.10299... and (4+1)^sqrt(2) = 9.73852... there are no primes (8 and 9 aren't primes).

%t a = {}; k = Sqrt[2]; Do[If[Length[Select[Range[Ceiling[n^k], Floor[(n + 1)^k]], PrimeQ]] == 0, AppendTo[a, n]], {n, 3000}]; a

%Y Cf. A014085, A143898, A143935, A144140.

%K nonn

%O 1,1

%A _Artur Jasinski_, Sep 11 2008

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

Last modified April 22 06:01 EDT 2021. Contains 343161 sequences. (Running on oeis4.)