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!)
A128038 Primes p such that p1=2p-33 and p2=2p+33 are consecutive primes. 0
129533, 141263, 212873, 323243, 381077, 393697, 449677, 486377, 525607, 583753, 693733, 774343, 988733, 1115453, 1138987, 1200887, 1204823, 1394083, 1419163, 1604143, 1661237, 1688887, 1760797, 1823567, 1825687, 1880363, 1972037 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
LINKS
EXAMPLE
{p,p1,p2,pi(p1),pi(p2)}:{129533,259033,259099,22765,22766},{141263,282493,282559,24644,24645},{212873,425713,425779,35832,35833},{323243,646453,646519,52557,52558},{381077,762121,762187,61145,61146},{393697,787361,787427,63011,63012}.
MAPLE
a:=proc(n) if isprime(n)=true and isprime(2*n-33)=true and nextprime(2*n-33)=2*n+33 then n else fi end: seq(a(n), n=1..3000000); # Emeric Deutsch, May 09 2007
MATHEMATICA
cp66Q[n_]:=Module[{p1=2n-33}, PrimeQ[p1]&&NextPrime[p1]-p1==66]; Select[Prime[Range[150000]], cp66Q] (* Harvey P. Dale, Mar 24 2011 *)
CROSSREFS
Cf. A103806.
Sequence in context: A232122 A232420 A114668 * A210273 A250961 A225026
KEYWORD
nonn
AUTHOR
Zak Seidov, May 07 2007
EXTENSIONS
More terms from Emeric Deutsch, May 09 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 28 20:05 EDT 2024. Contains 371254 sequences. (Running on oeis4.)