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A098649
Primes of the form 2(p+q) + 1, where p and q are consecutive primes.
2
11, 17, 37, 61, 73, 137, 157, 181, 241, 257, 277, 373, 397, 409, 421, 433, 577, 601, 617, 641, 661, 769, 821, 1097, 1117, 1129, 1153, 1201, 1237, 1249, 1297, 1453, 1481, 1597, 1621, 1657, 1861, 1933, 2089, 2129, 2281, 2297, 2417, 2441, 2473, 2749, 2857, 3037
OFFSET
1,1
COMMENTS
a(n) == 1 (mod 4), except for the initial term.
LINKS
MATHEMATICA
Select[ Table[2(Prime[i] + Prime[i + 1]) + 1, {i, 150}], PrimeQ[ # ] &] (* Robert G. Wilson v, Sep 19 2004 *)
Select[2*Total[#]+1&/@Partition[Prime[Range[200]], 2, 1], PrimeQ] (* Harvey P. Dale, Dec 25 2019 *)
CROSSREFS
Cf. A097361.
Sequence in context: A317453 A339247 A317678 * A078872 A291374 A181421
KEYWORD
nonn
AUTHOR
Giovanni Teofilatto, Sep 18 2004
EXTENSIONS
More terms from Robert G. Wilson v, Sep 19 2004
STATUS
approved