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A132234 Primes congruent to 19 (mod 30). 9
19, 79, 109, 139, 199, 229, 349, 379, 409, 439, 499, 619, 709, 739, 769, 829, 859, 919, 1009, 1039, 1069, 1129, 1249, 1279, 1399, 1429, 1459, 1489, 1549, 1579, 1609, 1669, 1699, 1759, 1789, 1879, 1999, 2029, 2089, 2179, 2239, 2269, 2389, 2539, 2659, 2689 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Also primes congruent to 4 (mod 15). - N. J. A. Sloane, Jul 11 2008

Primes ending in 9 with (SOD-1)/3 integer where SOD is sum of digits. - Ki Punches

LINKS

Vincenzo Librandi, Table of n, a(n) for n = 1..1000

C. K. Caldwell, The Prime Pages.

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

FORMULA

a(n) = A158806(n)*30 + 19. - Chandler

Intersection of A030433 and A002476. - Chandler

MATHEMATICA

Select[Prime[Range[1000]], MemberQ[{19}, Mod[#, 30]]&] (* Vincenzo Librandi, Aug 14 2012 *)

Select[Range[19, 2700, 30], PrimeQ] (* Harvey P. Dale, Dec 26 2014 *)

PROG

(MAGMA) [p: p in PrimesUpTo(3000) | p mod 30 eq 19 ]; // Vincenzo Librandi, Aug 14 2012

(PARI) is(n)=isprime(n) && n%30==19 \\ Charles R Greathouse IV, Jul 01 2016

CROSSREFS

Cf. A000040, A039949, A132230-A132236.

Sequence in context: A098467 A041700 A213832 * A074822 A139871 A142789

Adjacent sequences:  A132231 A132232 A132233 * A132235 A132236 A132237

KEYWORD

nonn,easy

AUTHOR

Omar E. Pol, Aug 15 2007

EXTENSIONS

Extended by Ray Chandler, Apr 07 2009

STATUS

approved

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Last modified August 23 12:00 EDT 2019. Contains 326222 sequences. (Running on oeis4.)