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A339476
Numbers at the start of a run of exactly 3 consecutive primes that are Sophie Germain primes.
6
2, 20753, 103613, 145091, 148829, 199103, 291491, 353453, 356579, 362753, 367721, 475511, 521819, 527099, 552053, 603173, 609803, 639833, 691973, 726413, 810791, 812921, 825479, 940403, 980459, 998201, 1103549, 1117769, 1132793, 1231883, 1329131, 1331783
OFFSET
1,1
LINKS
FORMULA
Apart from a(1) = 2, a(n) == 5 (mod 6). - Hugo Pfoertner, Apr 25 2021
CROSSREFS
Cf. A005384, (Sophie Germain primes), A128825, A338700, A339474, A339475, A339477, A339478.
Sequence in context: A173156 A214598 A346988 * A242959 A123692 A290741
KEYWORD
nonn
AUTHOR
Jon E. Schoenfield, Apr 24 2021
STATUS
approved