

A049481


Both p and p+30 are primes.


11



7, 11, 13, 17, 23, 29, 31, 37, 41, 43, 53, 59, 67, 71, 73, 79, 83, 97, 101, 107, 109, 127, 137, 149, 151, 163, 167, 181, 193, 197, 199, 211, 227, 233, 239, 241, 251, 263, 277, 281, 283, 307, 317, 337, 349, 353, 359, 367, 379, 389, 401, 409, 419, 431, 433, 449
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OFFSET

1,1


COMMENTS

30 = A002110(3) is the 3rd primorial number.
p and p+30 are not necessarily consecutive primes. Initial segment of A045320 is identical, but 113 is not in this sequence because 113 + 30 = 143 is divisible by 13.


LINKS

Harvey P. Dale, Table of n, a(n) for n = 1..10000


EXAMPLE

Both 7 and 7 + 2*3*5 = 37 are prime.


MATHEMATICA

lst={}; Do[p=Prime[n]; If[PrimeQ[p+30], AppendTo[lst, p]], {n, 6!}]; lst (* Vladimir Joseph Stephan Orlovsky, Jan 04 2009 *)
Select[Prime[Range[100]], PrimeQ[#+30]&] (* Harvey P. Dale, Apr 28 2012 *)


CROSSREFS

Cf. A045320, A001359, A023201.
Cf. A049482, A049485, A049481, A154114.  Vladimir Joseph Stephan Orlovsky, Jan 04 2009
Sequence in context: A103486 A086843 A260714 * A175412 A173700 A067557
Adjacent sequences: A049478 A049479 A049480 * A049482 A049483 A049484


KEYWORD

nonn


AUTHOR

Labos Elemer


STATUS

approved



