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A142414 Primes congruent to 1 mod 49. 1
197, 491, 883, 1373, 1471, 1667, 2549, 2647, 2843, 3137, 3529, 3823, 4019, 4999, 5783, 5881, 6469, 6763, 6959, 7057, 7253, 7351, 7547, 7841, 8233, 8429, 8527, 8821, 9311, 10193, 10487, 10781, 11173, 11369, 11467, 12251, 13721, 14407, 14897, 15289, 15583 (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) ~ 42n log n. - Charles R Greathouse IV, Jul 03 2016

MATHEMATICA

Select[Prime[Range[2500]], MemberQ[{1}, Mod[#, 49]] &] (* Vincenzo Librandi, Aug 27 2012 *)

Select[Range[1, 16000, 49], PrimeQ] (* Harvey P. Dale, Nov 12 2013 *)

PROG

(MAGMA) [p: p in PrimesUpTo(16000) | p mod 49 eq 1]; // Vincenzo Librandi, Aug 27 2012

(PARI) is(n)=isprime(n) && n%49==1 \\ Charles R Greathouse IV, Jul 03 2016

CROSSREFS

Cf. A000040.

Sequence in context: A142568 A188336 A142230 * A142812 A204844 A031706

Adjacent sequences:  A142411 A142412 A142413 * A142415 A142416 A142417

KEYWORD

nonn,easy

AUTHOR

N. J. A. Sloane, Jul 11 2008

STATUS

approved

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Last modified May 17 12:01 EDT 2021. Contains 343971 sequences. (Running on oeis4.)