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!)
A142011 Primes congruent to 7 mod 31. 1
7, 131, 193, 317, 379, 503, 751, 937, 1061, 1123, 1433, 1619, 1867, 2053, 2239, 2549, 2797, 3169, 3541, 3727, 3851, 4099, 4409, 4657, 4967, 5153, 5711, 5897, 6269, 6703, 6827, 7013, 7757, 8191, 8377, 8501, 8563, 9059, 9431, 9679, 9803, 10733, 11353, 12097 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Vincenzo Librandi, Table of n, a(n) for n = 1..1000

FORMULA

a(n) ~ 30n log n. - Charles R Greathouse IV, Jul 03 2016

MATHEMATICA

Select[Range[7, 20000, 31], PrimeQ] (* Vladimir Joseph Stephan Orlovsky, Apr 20 2011 *)

PROG

(MAGMA) [ p: p in PrimesUpTo(30000) | p mod 31 eq 7 ]; // Vincenzo Librandi, Apr 20 2011

(PARI) is(n)=isprime(n) && n%31==7 \\ Charles R Greathouse IV, Jul 03 2016

CROSSREFS

Cf. A000040, A142005, A142006.

Sequence in context: A332050 A134056 A123036 * A074224 A158701 A201308

Adjacent sequences:  A142008 A142009 A142010 * A142012 A142013 A142014

KEYWORD

nonn,easy

AUTHOR

N. J. A. Sloane, Jul 11 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 | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified September 20 07:20 EDT 2021. Contains 347577 sequences. (Running on oeis4.)