cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

A090607 Primes of the form 6*p - 5 such that p and 6*p - 1 are primes.

Original entry on oeis.org

7, 13, 37, 97, 109, 277, 313, 349, 397, 613, 673, 757, 937, 1429, 1609, 1693, 1873, 2269, 2293, 2377, 2689, 2797, 3457, 3673, 3697, 3877, 4933, 4969, 5437, 5569, 5857, 6577, 6733, 7669, 8233, 8677, 8929, 9133, 10177, 10333, 10729, 11257, 11593, 12097
Offset: 1

Views

Author

Ray Chandler, Dec 06 2003

Keywords

Crossrefs

Programs

  • PARI
    lista(nn) = forprime(p=2, nn, if(isprime(6*p-1)&&isprime(6*p-5), print1(6*p-5, ", "))); \\ Jinyuan Wang, Aug 04 2021

Formula

a(n) = 6*A089144(n) - 5.

Extensions

Name clarified by Jinyuan Wang, Aug 03 2021