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 A105182 Numbers k such that 2^(2*(k+1)) + 2^k + 1 is prime. 1
 1, 5, 9, 49, 61, 81, 149, 413, 485, 661, 709, 1337, 2885, 2925, 3013, 7213, 9669, 10245 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 LINKS Steven Harvey, Inverse Carol Primes EXAMPLE 2^4 + 2^1 + 1 = 19 is prime so a(1)=1. 2^12 + 2^5 + 1 = 4129 is prime so a(2)=5. PROG (PARI) is(n)=ispseudoprime(2^(2*(n+1))+2^n+1) \\ Charles R Greathouse IV, Jun 13 2017 (Magma) [k: k in [0..200] | IsPrime(2^(2*(k+1))+2^k+1)]; // Jinyuan Wang, Mar 20 2020 CROSSREFS Cf. A105181. Sequence in context: A149502 A219701 A088974 * A100457 A080872 A328333 Adjacent sequences: A105179 A105180 A105181 * A105183 A105184 A105185 KEYWORD nonn,more AUTHOR Pierre CAMI, Apr 11 2005 EXTENSIONS More terms from Herman Jamke (hermanjamke(AT)fastmail.fm), Jan 05 2008 STATUS approved

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Last modified February 6 03:21 EST 2023. Contains 360091 sequences. (Running on oeis4.)