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

LINKS

Reinhard Zumkeller, Table of n, a(n) for n = 1..10000

C. K. Caldwell, The Prime Pages.

Omar E. Pol, Determinacion geometrica de los numeros primos y perfectos.

MATHEMATICA

Select[Prime[Range[1000]], MemberQ[{1, 29}, Mod[#, 30]]&] (* Vincenzo Librandi, Aug 14 2012 *)

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

CROSSREFS

Cf. A000040, A001097, A001359, A006512, A039949, A057204, A068228, A087715, A129805, A117223, A010051.

Sequence in context: A104071 A288616 A273547 * A132243 A125523 A156976

Adjacent sequences:  A132237 A132238 A132239 * A132241 A132242 A132243

KEYWORD

easy,nonn

AUTHOR

Omar E. Pol, Aug 15 2007

STATUS

approved

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Last modified July 21 04:40 EDT 2019. Contains 325189 sequences. (Running on oeis4.)