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 A141883 Primes congruent to 9 mod 20. 16
 29, 89, 109, 149, 229, 269, 349, 389, 409, 449, 509, 569, 709, 769, 809, 829, 929, 1009, 1049, 1069, 1109, 1129, 1229, 1249, 1289, 1409, 1429, 1489, 1549, 1609, 1669, 1709, 1789, 1889, 1949, 2029, 2069, 2089, 2129, 2269, 2309, 2389, 2549, 2609, 2689, 2729 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS Vincenzo Librandi, Table of n, a(n) for n = 1..1000 MATHEMATICA Select[Range[9, 5000, 20], PrimeQ[#]&] (* Vladimir Joseph Stephan Orlovsky, Mar 31 2011*) PROG (MAGMA) [p: p in PrimesUpTo(3000) | p mod 20 eq 9 ]; // Vincenzo Librandi, Aug 16 2012 (PARI) is(n)=isprime(n) && n%20==9 \\ Charles R Greathouse IV, Jul 01 2016 CROSSREFS Cf. A000040, A105854, A141881, A141882. Sequence in context: A042658 A042660 A047650 * A142791 A325073 A152294 Adjacent sequences:  A141880 A141881 A141882 * A141884 A141885 A141886 KEYWORD nonn,easy AUTHOR N. J. A. Sloane, Jul 11 2008 STATUS approved

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Last modified June 25 03:56 EDT 2019. Contains 324338 sequences. (Running on oeis4.)