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A248215 Primes of form x^2+13*y^2 (mod 52). 0
13, 17, 29, 1, 9, 49, 9, 1, 17, 25, 25, 49, 9, 17, 1, 25, 9, 25, 17, 1, 49, 29, 17, 29, 49, 1, 25, 29, 17, 29, 49, 25, 49, 1, 17, 9, 25, 9, 29, 1, 17, 25, 9, 49, 17, 1, 29, 49, 1, 9, 29, 25, 29, 49, 25, 49, 1, 9, 25, 29, 17, 25, 9, 1, 17, 29, 9, 25, 49, 17, 1, 25, 1, 9, 49, 9, 29, 29, 1, 9, 1, 17 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Primes of form x^2+13*y^2 are congruent to {1, 9, 13, 17, 25, 29, or 49} (mod 52). Among first 10000 such primes (A033210), the corresponding frequences are: 1664, 1665, 1, 1667, 1661, 1666, 1676 - remarkably uniform distribution except for prime 13.

LINKS

Table of n, a(n) for n=1..82.

CROSSREFS

Cf. A033210.

Sequence in context: A335036 A307880 A155923 * A283135 A052491 A283294

Adjacent sequences:  A248212 A248213 A248214 * A248216 A248217 A248218

KEYWORD

nonn

AUTHOR

Zak Seidov, Oct 04 2014

STATUS

approved

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Last modified June 20 12:24 EDT 2021. Contains 345164 sequences. (Running on oeis4.)