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