A256602 Primes of form 12*k + 1 and not a twin prime.
37, 97, 157, 277, 337, 373, 397, 409, 457, 541, 577, 613, 673, 709, 733, 757, 769, 853, 877, 937, 997, 1009, 1069, 1117, 1129, 1201, 1213, 1237, 1249, 1297, 1381, 1549, 1597, 1657, 1693, 1741, 1753, 1777, 1801, 1861, 1993, 2017, 2053, 2137, 2161, 2221, 2281, 2293, 2377
Offset: 1
Keywords
Examples
37 = 12*3+1 and 35 is not prime, so 37 belongs to the sequence.
Crossrefs
Cf. A142793 (primes congruent to 37 mod 60).
Programs
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PARI
is(n)=isprime(n) && n%12==1 && !isprime(n+2) && !isprime(n-2) \\ Charles R Greathouse IV, Apr 06 2015
Formula
a(n) ~ 4n log n. - Charles R Greathouse IV, Apr 06 2015
Comments