login
The OEIS is supported by the many generous donors to the OEIS Foundation.

 

Logo
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A130796 Primes p such that nextprime(p)-p is not power of 2. 2
23, 31, 47, 53, 61, 73, 83, 113, 131, 139, 151, 157, 167, 173, 181, 199, 211, 233, 241, 251, 257, 263, 271, 283, 293, 317, 331, 337, 353, 367, 373, 383, 409, 421, 433, 443, 467, 503, 509, 523, 541, 547, 557, 563, 571, 577, 587, 593, 601, 607, 619, 631, 647 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Indices of primes are 9,11,15,16,18,21,23,30,32,34,36,37,39,40,42,46,47,51, 53,54,55,56,58,61,62,66,... (subsequence of A113339).
LINKS
MATHEMATICA
<<NumberTheory`NumberTheoryFunctions`; c=0; p=2; Do[p1=NextPrime[p]; If[ !IntegerQ[Log[2, p1-p]], c++; a[c]=p]; p=p1, {200}]; Table[a[i], {i, c}]
Select[Prime[Range[200]], !IntegerQ[Log[2, NextPrime[#]-#]]&] (* Harvey P. Dale, Apr 20 2011 *)
CROSSREFS
Cf. A001223 Differences between consecutive primes, A082509 Differences between consecutive primes that are not powers of 2, A082508 Differences between consecutive primes that are powers of 2, A113339 Integers n such that prime(n+1)-prime(n) is nonprime, squarefree.
Sequence in context: A276435 A083370 A124582 * A258578 A031924 A257528
KEYWORD
nonn
AUTHOR
Zak Seidov, Aug 20 2007
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.

License Agreements, Terms of Use, Privacy Policy. .

Last modified March 29 00:26 EDT 2024. Contains 371264 sequences. (Running on oeis4.)