login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A107142 Primes of the form x^2 + 36y^2. 2
37, 61, 157, 193, 313, 349, 373, 397, 433, 577, 601, 613, 661, 673, 769, 853, 877, 937, 997, 1021, 1069, 1201, 1297, 1321, 1429, 1549, 1657, 1693, 1741, 1789, 1801, 1861, 1933, 1993, 2053, 2137, 2269, 2293, 2389, 2437, 2473, 2521, 2593, 2749 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Discriminant = -144. See A107132 for more information.

These appear to be the same as Glaisher's 1889 list of primes == 1 mod 12 that have "positive character". - N. J. A. Sloane, Jul 30 2015

REFERENCES

J. W. L. Glaisher, On the square of Euler's series, Proc. London Math. Soc., 21 (1889), 182-194.

LINKS

Vincenzo Librandi and Ray Chandler, Table of n, a(n) for n = 1..10000 [First 1000 terms from Vincenzo Librandi]

S. R. Finch, Powers of Euler's q-Series, (arXiv:math.NT/0701251).

N. J. A. Sloane et al., Binary Quadratic Forms and OEIS (Index to related sequences, programs, references)

MATHEMATICA

QuadPrimes2[1, 0, 36, 10000] (* see A106856 *)

PROG

(PARI) list(lim)=my(v=List(), w, t); for(x=1, sqrtint(lim\1), w=x^2; for(y=1, sqrtint((lim-w)\36), if(isprime(t=w+36*y^2), listput(v, t)))); Set(v) \\ Charles R Greathouse IV, Feb 09 2017

CROSSREFS

Sequence in context: A168006 A139960 A103946 * A158018 A226697 A117475

Adjacent sequences:  A107139 A107140 A107141 * A107143 A107144 A107145

KEYWORD

nonn,easy

AUTHOR

T. D. Noe, May 13 2005

STATUS

approved

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

License Agreements, Terms of Use, Privacy Policy. .

Last modified May 6 17:38 EDT 2021. Contains 343586 sequences. (Running on oeis4.)