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A079131 Primes such that iterated sum-of-digits (A038194) is odd. 3
3, 5, 7, 19, 23, 37, 41, 43, 59, 61, 73, 79, 97, 109, 113, 127, 131, 149, 151, 163, 167, 181, 199, 223, 239, 241, 257, 271, 277, 293, 307, 311, 313, 331, 347, 349, 367, 379, 383, 397, 401, 419, 421, 433, 439, 457, 487, 491, 509, 523, 541, 547, 563, 577, 599 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Subsequence of primes of A187318. - Michel Marcus, Jun 08 2015

Primes congruent to 1, 3, 5, 7 mod 18. - Robert Israel, Jun 08 2015

LINKS

Robert Israel, Table of n, a(n) for n = 1..10000

MAPLE

select(isprime, [3, seq(seq(i*18+j, j=[1, 5, 7]), i=0..100)]); # Robert Israel, Jun 08 2015

MATHEMATICA

Select[Prime[Range[120]], OddQ[Mod[#, 9]] &] (* Bruno Berselli, Aug 31 2012 *)

PROG

(PARI) forprime(p=2, 600, if((p%9)%2==1, print1(p, ", ")))

(MAGMA) [p: p in PrimesUpTo(600) | p mod 18 in [1, 3, 5, 7]]; // Vincenzo Librandi, Jun 07 2015

(MAGMA) [a: n in [0..1000] | IsPrime(a) where a is Floor(9*n/5)]; // Vincenzo Librandi, Jun 08 2015

CROSSREFS

Cf. A038194, A078403, A079130, A079132, A187318.

Sequence in context: A261456 A154524 A184805 * A179687 A106919 A005850

Adjacent sequences:  A079128 A079129 A079130 * A079132 A079133 A079134

KEYWORD

nonn,easy,base

AUTHOR

Klaus Brockhaus, Dec 28 2002

STATUS

approved

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Last modified October 15 00:14 EDT 2019. Contains 328025 sequences. (Running on oeis4.)