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A145482 Primes p such that 2p - 19 is prime. 1
11, 13, 19, 31, 43, 61, 73, 79, 109, 151, 163, 193, 199, 229, 241, 271, 283, 313, 331, 373, 379, 421, 439, 463, 541, 571, 661, 673, 709, 733, 739, 751, 823, 859, 883, 1009, 1051, 1129, 1153, 1201, 1279, 1453, 1543, 1549, 1663, 1669, 1741, 1759, 1783, 1789 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Ivan Neretin, Table of n, a(n) for n = 1..10000

FORMULA

a(n) = 2*A145476(n) - 19.

MATHEMATICA

aa = {}; k = 19; Do[If[PrimeQ[(k + Prime[n])/2], AppendTo[aa, k + Prime[n])/2]], {n, 1, 500}]; aa

(* Second program: *)

Select[Prime@ Range@ 300, And[PrimeQ@ #, # > 0] &[2 # - 19] &] (* Michael De Vlieger, Jan 23 2017 *)

CROSSREFS

Cf. A063908-A063913, A092109, A145471-A145480.

Sequence in context: A092402 A081983 A081984 * A167497 A068579 A048519

Adjacent sequences:  A145479 A145480 A145481 * A145483 A145484 A145485

KEYWORD

nonn

AUTHOR

Artur Jasinski, Oct 11 2008

STATUS

approved

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Last modified February 29 03:18 EST 2020. Contains 332353 sequences. (Running on oeis4.)