|
|
A049481
|
|
Both p and p+30 are primes.
|
|
13
|
|
|
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
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
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
|
|
|
EXAMPLE
|
Both 7 and 7 + 2*3*5 = 37 are prime.
|
|
MATHEMATICA
|
Select[Prime[Range[100]], PrimeQ[#+30]&] (* Harvey P. Dale, Apr 28 2012 *)
|
|
CROSSREFS
|
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
|
|
STATUS
|
approved
|
|
|
|