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A142601
Primes congruent to 1 mod 55.
1
331, 661, 881, 991, 1321, 1871, 2311, 2531, 2861, 2971, 3191, 3301, 3631, 3851, 4621, 4951, 5171, 5281, 5501, 6271, 6491, 7151, 7481, 7591, 8581, 9241, 9461, 9791, 9901, 10781, 10891, 11551, 12101, 12211, 12541, 13421, 13751, 14081, 14411, 14741, 14851
OFFSET
1,1
LINKS
FORMULA
a(n) ~ 40n log n. - Charles R Greathouse IV, Jul 04 2016
MATHEMATICA
Select[Prime[Range[2500]], MemberQ[{1}, Mod[#, 55]] &] (* Vincenzo Librandi, Aug 30 2012 *)
PROG
(Magma) [p: p in PrimesUpTo(16000) | p mod 55 eq 1]; // Vincenzo Librandi, Aug 30 2012
(PARI) is(n)=isprime(n) && n%55==1 \\ Charles R Greathouse IV, Jul 04 2016
CROSSREFS
Cf. A000040.
Sequence in context: A248535 A142763 A020373 * A210534 A210511 A142824
KEYWORD
nonn,easy
AUTHOR
N. J. A. Sloane, Jul 11 2008
STATUS
approved