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!)
A174913 Lesser of twin primes p1 such that 2*p1+p2 is a prime number. 10
3, 5, 17, 29, 59, 149, 197, 227, 239, 269, 419, 569, 659, 1277, 1427, 1487, 1667, 1949, 2087, 2129, 2267, 2339, 2549, 2789, 2999, 3359, 3389, 3929, 4049, 4157, 4217, 4229, 4517, 4637, 5099, 5417, 5477, 6089, 6197, 6299, 6359, 6569, 6659, 6827, 6959, 7127 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
(p1, p2=p1+2) is a pair of twin primes.
LINKS
MATHEMATICA
lst={}; Do[p1=Prime[n]; p2=p1+2; If[PrimeQ[p2]&&PrimeQ[2*p1+p2], AppendTo[lst, p1]], {n, 7!}]; lst
Transpose[Select[Partition[Prime[Range[1000]], 2, 1], #[[2]]-#[[1]] == 2 && PrimeQ[2#[[1]]+#[[2]]]&]][[1]] (* Harvey P. Dale, Apr 09 2012 *)
CROSSREFS
Sequence in context: A023226 A113169 A350856 * A079496 A230639 A038898
KEYWORD
nonn
AUTHOR
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.)