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 A248372 Numbers m such that both p = 52*m + 1 and q = 52*p + 1 are prime. 1
 36, 39, 60, 126, 171, 189, 195, 300, 315, 405, 420, 435, 504, 540, 570, 606, 720, 756, 816, 876, 960, 1089, 1221, 1224, 1260, 1329, 1365, 1371, 1389, 1404, 1530, 1554, 1674, 1740, 1785, 1791, 1914, 1959, 2085, 2244, 2304, 2334, 2376, 2451, 2454, 2520, 2631, 2646, 2715, 2799, 2976 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS All terms are divisible by 3, because if m == 1 or 2 (mod 3), either q or p is divisible by 3. LINKS Jens Kruse Andersen, Table of n, a(n) for n = 1..10000 MATHEMATICA s={}; Do[If[PrimeQ[p=52*n+1)]&&PrimeQ[52*p+1], AppendTo[s, n]], {n, 3000}]; s PROG (PARI) for(n=1, 10^4, p=52*n+1; if(isprime(p)&&isprime(52*p+1), print1(n, ", "))) \\ Derek Orr, Oct 06 2014 CROSSREFS Subsequence of A248221. Cf. A033210, A142508, A171517, A248221, A248368. Sequence in context: A261380 A337861 A261373 * A349705 A129288 A083248 Adjacent sequences: A248369 A248370 A248371 * A248373 A248374 A248375 KEYWORD nonn AUTHOR Zak Seidov, Oct 05 2014 STATUS approved

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Last modified August 7 11:41 EDT 2024. Contains 375012 sequences. (Running on oeis4.)