|
Search: id:A139880
|
|
|
| A139880 |
|
Primes of the form 13x^2+2xy+13y^2. |
|
+0
3
|
|
| 13, 61, 157, 181, 229, 349, 397, 661, 733, 829, 853, 997, 1021, 1069, 1237, 1669, 1693, 1741, 1861, 2029, 2341, 2677, 2749, 2917, 3037, 3181, 3253, 3373, 3517, 3541, 3709, 3853, 3877, 4021, 4093, 4261, 4357, 4549, 4597, 4861, 4933, 5101
(list; graph; listen)
|
|
|
OFFSET
|
1,1
|
|
|
COMMENT
|
Discriminant=-672. See A139827 for more information.
Also primes of the forms 13x^2+4xy+52y^2 and 13x^2+8xy+40y^2. See A140633. - T. D. Noe (noe(AT)sspectra.com), May 19 2008
|
|
FORMULA
|
The primes are congruent to {13, 61, 157} (mod 168).
|
|
MATHEMATICA
|
Union[QuadPrimes[13, 2, 13, 10000], QuadPrimes[13, -2, 13, 10000]] (* see A106856 *)
|
|
CROSSREFS
|
Sequence in context: A086361 A119151 A081589 this_sequence A127876 A047673 A141725
Adjacent sequences: A139877 A139878 A139879 this_sequence A139881 A139882 A139883
|
|
KEYWORD
|
nonn,easy
|
|
AUTHOR
|
T. D. Noe (noe(AT)sspectra.com), May 02 2008
|
|
|
Search completed in 0.002 seconds
|
