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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 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Vincenzo Librandi, Table of n, a(n) for n = 1..1000

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

Adjacent sequences:  A142598 A142599 A142600 * A142602 A142603 A142604

KEYWORD

nonn,easy

AUTHOR

N. J. A. Sloane, Jul 11 2008

STATUS

approved

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Last modified March 28 05:29 EDT 2020. Contains 333073 sequences. (Running on oeis4.)