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!)
A141976 Primes congruent to 27 mod 28. 2
83, 139, 167, 223, 251, 307, 419, 503, 587, 643, 727, 811, 839, 1063, 1091, 1231, 1259, 1399, 1427, 1483, 1511, 1567, 1847, 1931, 1987, 2099, 2239, 2267, 2351, 2659, 2687, 2939, 3023, 3079, 3163, 3191, 3331, 3359, 3499, 3527, 3583, 3779, 3863, 3919, 3947 (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) ~ 12n log n. - Charles R Greathouse IV, Jul 02 2016

MATHEMATICA

Select[Prime[Range[1500]], MemberQ[{27}, Mod[#, 28]]&] (* Vincenzo Librandi, Aug 17 2012 *)

Select[Range[27, 4000, 28], PrimeQ] (* Harvey P. Dale, May 14 2016 *)

PROG

(MAGMA) [p: p in PrimesUpTo(5000) | p mod 28 eq 27 ]; // Vincenzo Librandi, Aug 17 2012

(PARI) is(n)=isprime(n) && n%28==27 \\ Charles R Greathouse IV, Jul 02 2016

CROSSREFS

Cf. A000040.

Sequence in context: A165502 A126711 A039548 * A142652 A256345 A140543

Adjacent sequences:  A141973 A141974 A141975 * A141977 A141978 A141979

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 June 21 03:51 EDT 2021. Contains 345354 sequences. (Running on oeis4.)