A132248 - OEIS

A132248

Isolated primes congruent to 1 (mod 30).

211, 331, 541, 631, 691, 751, 991, 1171, 1201, 1381, 1471, 1531, 1741, 1801, 1831, 1861, 2011, 2161, 2221, 2251, 2281, 2371, 2521, 2671, 2851, 3061, 3181, 3271, 3511, 3571, 3631, 3691, 4111, 4201, 4441, 4561, 4591, 4621, 4831, 4861

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

OFFSET

1,1

LINKS

Harvey P. Dale, 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.

MATHEMATICA

Select[Select[Partition[Prime[Range[700]], 3, 1], FreeQ[Differences[#], 2]&][[All, 2]], Mod[#, 30]==1&] (* Harvey P. Dale, Nov 30 2019 *)

CROSSREFS

Cf. A007510.

Sequence in context: A139651 A139985 A293605 * A142901 A142168 A142288

Adjacent sequences: A132245 A132246 A132247 * A132249 A132250 A132251

KEYWORD

easy,nonn

AUTHOR

Omar E. Pol, Aug 20 2007

STATUS

approved