A260808 Primes p such that p = q^2 - 12*r^2 where q and r are also primes.

61, 73, 181, 229, 241, 313, 373, 421, 541, 661, 733, 757, 853, 1069, 1093, 1321, 1381, 1453, 1549, 1621, 1693, 1741, 1801, 1861, 2029, 2161, 2221, 2269, 2557, 3037, 3061, 3181, 3301, 3373, 3433, 3613, 3673, 3853, 3877, 4261, 4441, 4597, 4789, 4861, 4933

Offset

1,1

Links

Colin Barker, Table of n, a(n) for n = 1..1000

Example

61 is in the sequence because 61 = 13^2 - 12*3^2 and 61, 13 and 3 are all primes.

Crossrefs

Cf. A260805, A260806, A260807, A260809.

Sequence in context: A364662 A227520 A033236 * A141457 A112998 A339778

Adjacent sequences: A260805 A260806 A260807 * A260809 A260810 A260811

Keyword

nonn

Author

Colin Barker, Jul 31 2015

Status

approved