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A132240
Primes congruent to {1, 29} mod 30.
3
29, 31, 59, 61, 89, 149, 151, 179, 181, 211, 239, 241, 269, 271, 331, 359, 389, 419, 421, 449, 479, 509, 541, 569, 571, 599, 601, 631, 659, 661, 691, 719, 751, 809, 811, 839, 929, 991, 1019, 1021, 1049, 1051, 1109, 1171, 1201, 1229, 1231
OFFSET
1,1
COMMENTS
For every prime p here, the cyclotomic polynomial Phi(15p,x) is flat.
Primes in A175887. [Reinhard Zumkeller, Jan 07 2012]
MATHEMATICA
Select[Prime[Range[1000]], MemberQ[{1, 29}, Mod[#, 30]]&] (* Vincenzo Librandi, Aug 14 2012 *)
Select[Flatten[#+{1, 29}&/@(30Range[0, 50])], PrimeQ] (* Harvey P. Dale, Sep 08 2021 *)
PROG
(Haskell)
a132240 n = a132240_list !! (n-1)
a132240_list = [x | x <- a175887_list, a010051 x == 1]
-- Reinhard Zumkeller, Jan 07 2012
(Magma) [ p: p in PrimesUpTo(1300) | p mod 30 in {1, 29} ]; // Vincenzo Librandi, Aug 14 2012
KEYWORD
easy,nonn
AUTHOR
Omar E. Pol, Aug 15 2007
STATUS
approved