login
A142187
Primes congruent to 11 mod 40.
1
11, 131, 211, 251, 331, 491, 571, 691, 811, 971, 1051, 1091, 1171, 1291, 1451, 1531, 1571, 1811, 1931, 2011, 2131, 2251, 2371, 2411, 2531, 2731, 2851, 2971, 3011, 3251, 3331, 3371, 3491, 3571, 3691, 3851, 3931, 4051, 4091, 4211, 4451, 4651, 4691, 4931, 5011
OFFSET
1,1
LINKS
FORMULA
a(n) ~ 16n log n. - Charles R Greathouse IV, Jul 03 2016
MATHEMATICA
Select[Prime[Range[2000]], MemberQ[{11}, Mod[#, 40]]&] (* Vincenzo Librandi, Aug 20 2012 *)
Select[Range[11, 5500, 40], PrimeQ] (* Harvey P. Dale, Sep 13 2021 *)
PROG
(Magma) [p: p in PrimesUpTo(7000) | p mod 40 eq 11]; // Vincenzo Librandi, Aug 20 2012
(PARI) is(n)=isprime(n) && n%40==11 \\ Charles R Greathouse IV, Jul 03 2016
CROSSREFS
Cf. A000040.
Sequence in context: A046210 A100757 A099677 * A201484 A216573 A140004
KEYWORD
nonn,easy
AUTHOR
N. J. A. Sloane, Jul 11 2008
STATUS
approved