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 A060844 Primes of the form 6*k^2 + 6*k + 31. 3

%I #12 Jul 03 2018 02:27:46

%S 31,43,67,103,151,211,283,367,463,571,691,823,967,1123,1291,1471,1663,

%T 1867,2083,2311,2551,2803,3067,3343,3631,3931,4243,4567,4903,6367,

%U 6763,7591,8467,8923,9391,9871,10867,11383,12451,13003,13567,14143,14731

%N Primes of the form 6*k^2 + 6*k + 31.

%C Prime for n=[0,28]. Discriminant is -708, which is class no. 4.

%H Harry J. Smith, <a href="/A060844/b060844.txt">Table of n, a(n) for n = 1..1000</a>

%o (PARI) { n=0; for (m=0, 2136, f=6*m^2 + 6*m + 31; if (isprime(f), write("b060844.txt", n++, " ", f)); ) } \\ _Harry J. Smith_, Jul 13 2009

%Y Cf. A060834.

%K nonn,easy

%O 1,1

%A _Tito Piezas III_, May 03 2001

%E More terms from Larry Reeves (larryr(AT)acm.org), May 07 2001

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Last modified April 14 23:31 EDT 2024. Contains 371667 sequences. (Running on oeis4.)