The OEIS is supported by the many generous donors to the OEIS Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A139891 Primes of the form 7x^2+30y^2. 1
 7, 37, 127, 277, 373, 463, 487, 613, 757, 823, 877, 967, 1087, 1093, 1117, 1213, 1303, 1327, 1423, 1453, 1597, 1663, 1933, 2053, 2143, 2293, 2437, 2503, 2557, 2647, 2767, 2797, 3343, 3607, 3613, 3637, 3733, 3823, 3847, 3943, 4327, 4447 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Discriminant=-840. See A139827 for more information. LINKS Vincenzo Librandi and Ray Chandler, Table of n, a(n) for n = 1..10000 [First 1000 terms from Vincenzo Librandi] N. J. A. Sloane et al., Binary Quadratic Forms and OEIS (Index to related sequences, programs, references) FORMULA The primes are congruent to {7, 37, 127, 247, 253, 277, 373, 463, 487, 583, 613, 757, 823} (mod 840). MATHEMATICA QuadPrimes2[7, 0, 30, 10000] (* see A106856 *) PROG (Magma) [ p: p in PrimesUpTo(5000) | p mod 840 in {7, 37, 127, 247, 253, 277, 373, 463, 487, 583, 613, 757, 823}]; // Vincenzo Librandi, Jul 30 2012 CROSSREFS Sequence in context: A282001 A038862 A136204 * A082113 A196597 A143991 Adjacent sequences: A139888 A139889 A139890 * A139892 A139893 A139894 KEYWORD nonn,easy AUTHOR T. D. Noe, May 02 2008 STATUS approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified January 28 04:25 EST 2023. Contains 359850 sequences. (Running on oeis4.)