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 A300010 Numbers k such that 3^k + k - 1 is a prime. 0
 1, 3, 65, 123, 435, 465, 677, 947, 4215, 5615 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS Next term, if it exists, is greater than 10000. Corresponding primes: 3, 29, 10301051460877537453973547267907, 48519278097689642681155855396759336072749841943521979872949, ... LINKS Table of n, a(n) for n=1..10. MAPLE select(k->isprime(3^k+k-1), [\$1..1000]); # Muniru A Asiru, Apr 05 2018 MATHEMATICA Flatten[{Select[Range[6000], PrimeQ[3^# + # - 1] &]}] PROG (Magma) [k: k in [1..700] | IsPrime(3^k+k-1)]; (PARI) lista(nn) = forstep(n=1, nn, 2, if(ispseudoprime(3^n + n - 1), print1(n, ", "))); \\ Altug Alkan, Apr 01 2018 CROSSREFS Cf. A173063, A301632. Sequence in context: A275044 A205645 A326429 * A196798 A196586 A197043 Adjacent sequences: A300007 A300008 A300009 * A300011 A300012 A300013 KEYWORD nonn,more AUTHOR Vincenzo Librandi, Apr 01 2018 STATUS approved

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Last modified June 5 12:07 EDT 2023. Contains 363136 sequences. (Running on oeis4.)