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

Offset: 1

Author

Omar E. Pol, Aug 20 2007

Keywords

• easy
• nonn

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.

Crossrefs

Cf. A007510.

Programs

Mathematica

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