|
| |
|
|
A103805
|
|
Primes p such that 2*p-27 and 2*p+27 are positive primes.
|
|
3
|
|
|
|
17, 23, 37, 43, 83, 103, 127, 197, 257, 307, 313, 317, 337, 373, 457, 673, 677, 727, 733, 797, 863, 887, 937, 953, 1013, 1063, 1283, 1303, 1597, 1667, 1693, 1777, 1783, 1987, 1997, 2053, 2063, 2267, 2297, 2393, 2473, 2543, 2707, 2777, 2833, 2837
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
|
OFFSET
|
1,1
|
|
|
LINKS
|
Harvey P. Dale, Table of n, a(n) for n = 1..1000
|
|
|
MATHEMATICA
|
Select[Range[17, 2000], PrimeQ[ # ] && PrimeQ[2# + 27] && PrimeQ[2# - 27] &]
Select[Prime[Range[5, 500]], And@@PrimeQ[2#+{27, -27}]&] (* Harvey P. Dale, Jul 06 2013 *)
|
|
|
PROG
|
(MAGMA) [p: p in PrimesUpTo(3000) | IsPrime(2*p-27) and IsPrime(2*p+27)]; [From Vincenzo Librandi, Nov 16 2010]
|
|
|
CROSSREFS
|
Cf. A103802, A103803, A103804.
Sequence in context: A072184 A107644 A158710 * A241528 A156567 A231332
Adjacent sequences: A103802 A103803 A103804 * A103806 A103807 A103808
|
|
|
KEYWORD
|
nonn
|
|
|
AUTHOR
|
Zak Seidov, Feb 16 2005
|
|
|
EXTENSIONS
|
More terms from Vincenzo Librandi, Mar 17 2010
|
|
|
STATUS
|
approved
|
| |
|
|
