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 A248221 Numbers m such that 52*m + 1 is prime. 6
 1, 3, 6, 10, 13, 18, 21, 24, 25, 31, 36, 39, 40, 43, 45, 46, 49, 55, 60, 64, 66, 73, 78, 85, 91, 94, 96, 109, 115, 123, 124, 126, 129, 130, 133, 138, 139, 141, 144, 145, 151, 154, 159, 165, 168, 171, 174, 178, 181, 189, 193, 195, 196, 201, 211, 223, 225, 229 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS All terms are == {0,1} mod 3, because 52*(3k+2) + 1 is divisible by 3. - Zak Seidov, Oct 05 2014 LINKS Zak Seidov, Table of n, a(n) for n = 1..2000 FORMULA a(n) = (A142508(n) - 1)/52. MAPLE A248221:=n->`if`(isprime(52*n+1), n, NULL): seq(A248221(n), n=1..500); # Wesley Ivan Hurt, Oct 05 2014 MATHEMATICA Select[Range[250], PrimeQ[52# + 1] &] (* Alonso del Arte, Oct 04 2014 *) PROG (PARI) for(n=1, 10^3, if(isprime(52*n+1), print1(n, ", "))) \\ Derek Orr, Oct 05 2014 CROSSREFS Cf. A033210, A142508. Sequence in context: A049880 A276219 A267593 * A189368 A128039 A027428 Adjacent sequences:  A248218 A248219 A248220 * A248222 A248223 A248224 KEYWORD nonn,easy AUTHOR Zak Seidov, Oct 04 2014 EXTENSIONS More terms from Wesley Ivan Hurt, Oct 05 2014 STATUS approved

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Last modified October 18 14:52 EDT 2019. Contains 328161 sequences. (Running on oeis4.)