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A142315
Primes congruent to 7 mod 45.
3
7, 97, 277, 367, 457, 547, 727, 907, 997, 1087, 1447, 1627, 1987, 2347, 2437, 2617, 2707, 2797, 2887, 3067, 3517, 3607, 3697, 3877, 3967, 4057, 4327, 4507, 4597, 4957, 5227, 5407, 5857, 6037, 6217, 6397, 6577, 7027, 7207, 7297, 7477, 7927, 8017, 8287, 8377
OFFSET
1,1
COMMENTS
Primes congruent to 7 mod 90. - Vladimir Joseph Stephan Orlovsky, Jul 14 2011.
LINKS
FORMULA
a(n) ~ 24n log n. - Charles R Greathouse IV, Jul 02 2016
MATHEMATICA
Select[Range[7, 30000, 90], PrimeQ] (* Vladimir Joseph Stephan Orlovsky, Jul 14 2011 *)
Select[Prime[Range[3000]], MemberQ[{7}, Mod[#, 45]]&] (* Vincenzo Librandi, Aug 25 2012 *)
PROG
(Magma) [p: p in PrimesUpTo(10000) | p mod 45 eq 7]; // Vincenzo Librandi, Aug 25 2012
(PARI) is(n)=isprime(n) && n%45==7 \\ Charles R Greathouse IV, Jul 02 2016
CROSSREFS
Cf. A000040.
Sequence in context: A177879 A090687 A116125 * A359637 A116288 A219088
KEYWORD
nonn,easy
AUTHOR
N. J. A. Sloane, Jul 11 2008
STATUS
approved