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 A274693 Numbers n such that 4^n + 3^(n+1) is prime. 0
 1, 2, 4, 5, 9, 10, 12, 17, 18, 29, 30, 40, 58, 82, 113, 129, 164, 192, 252, 524, 624, 766, 977, 1742, 2208, 2440, 3052, 4742, 5480, 16572, 17501 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS a(32) > 10^5. LINKS EXAMPLE 5 is a member since 4^5 + 3^6 = 1024 + 729 = 1753 which is a prime number. MATHEMATICA Select[Range[0, 100000], PrimeQ[4^# + 3^(# + 1)] &] PROG (PARI) lista(nn) = for(n=1, nn, if(ispseudoprime(4^n + 3^(n+1)), print1(n, ", "))); \\ Altug Alkan, Jul 02 2016 (Magma) [n: n in [1..700] | IsPrime(4^n + 3^(n+1))]; // Vincenzo Librandi, Jul 03 2016 CROSSREFS Cf. A093713, A082103, A093717, A093793, A096185, A093794, A093795, A096186, A271883. Sequence in context: A036795 A307563 A289175 * A024618 A089221 A347877 Adjacent sequences: A274690 A274691 A274692 * A274694 A274695 A274696 KEYWORD nonn,more AUTHOR Robert Price, Jul 02 2016 STATUS approved

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Last modified March 25 22:21 EDT 2023. Contains 361529 sequences. (Running on oeis4.)