login

Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 61st year, we have over 378,000 sequences, and we’ve reached 11,000 citations (which often say “discovered thanks to the OEIS”).

A237439
Triple Hex-primes: let f(n) = A102489(n); then sequence lists primes p such that f(p), f(f(p)) and f(f(f(p))) are also primes.
4
2, 3, 5, 7, 59, 61, 97, 101, 151, 257, 599, 647, 829, 1163, 1499, 1999, 2351, 2467, 2531, 2897, 2903, 3001, 3373, 4783, 4813, 5683, 6317, 6857, 6997, 7759, 8563, 8837, 8963, 9203, 9463, 9497, 9521, 10903, 10957
OFFSET
1,1
COMMENTS
The sequence is a subset of OEIS sequences A103144 and A237438
REFERENCES
Original research by OEIS contributor Andreas Boe, Feb 2014
LINKS
EXAMPLE
Dec61=prime -> Hex61=Dec97=prime -> Hex97=Dec 151=prime -> Hex151=Dec337=prime
CROSSREFS
Cf. A103144(Hex-primes), A237438 (Double Hex-primes), A237440 (Quadruple Hex-primes), A237441 (Quintuple Hex-primes)
Sequence in context: A364831 A244595 A244597 * A048402 A237440 A237441
KEYWORD
nonn,base
AUTHOR
Andreas Boe, Feb 07 2014
STATUS
approved