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A142186
Primes congruent to 9 mod 40.
1
89, 409, 449, 569, 769, 809, 929, 1009, 1049, 1129, 1249, 1289, 1409, 1489, 1609, 1889, 2089, 2129, 2609, 2689, 2729, 2969, 3049, 3089, 3169, 3209, 3329, 3449, 3529, 3769, 3889, 3929, 4049, 4129, 4289, 4409, 4649, 4729, 4889, 4969, 5009, 5209, 5449, 5569
OFFSET
1,1
LINKS
FORMULA
a(n) ~ 16n log n. - Charles R Greathouse IV, Jul 03 2016
MATHEMATICA
Select[Prime[Range[2000]], MemberQ[{9}, Mod[#, 40]]&] (* Vincenzo Librandi, Aug 20 2012 *)
PROG
(Magma)[p: p in PrimesUpTo(7000) | p mod 40 eq 9]; // Vincenzo Librandi, Aug 20 2012
(PARI) is(n)=isprime(n) && n%40==9 \\ Charles R Greathouse IV, Jul 03 2016
CROSSREFS
Cf. A000040.
Sequence in context: A061372 A254754 A083473 * A142757 A051416 A279366
KEYWORD
nonn,easy
AUTHOR
N. J. A. Sloane, Jul 11 2008
STATUS
approved