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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.)