OFFSET
1,2
LINKS
Makoto Kamada, Search for 70w33.
EXAMPLE
2 is in this sequence because 7*10^2 + 33 = 733 is prime.
4 is not in the sequence because 7*10^4 + 33 = 70033 = 59 * 1187.
Initial terms and associated primes:
a(1) = 1: 103;
a(2) = 2: 733;
a(3) = 6: 7000033;
a(4) = 10: 70000000033, etc.
MATHEMATICA
Select[Range[0, 3000], PrimeQ[7 10^# + 33] &]
PROG
(Magma) [n: n in [1..500] | IsPrime(7*10^n+33)];
(PARI) lista(nn) = for(n=1, nn, if(ispseudoprime(7*10^n+33), print1(n, ", "))); \\ Altug Alkan, Jul 05 2016
CROSSREFS
KEYWORD
nonn,more
AUTHOR
Vincenzo Librandi, Jul 04 2016
EXTENSIONS
a(19)-a(20) from Michael S. Branicky, Aug 16 2021
a(21)-a(26) from Kamada data by Tyler Busby, Apr 14 2024
STATUS
approved