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 A242929 Primes p such that 2^p - p^2 is prime. 0
 5, 7, 17, 19, 53, 83, 227, 461, 2221, 3547, 9029 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS a(12) > 23053. - Robert Israel, Jun 10 2014 LINKS EXAMPLE 5 is in this sequence because 5 and 2^5 - 5^2 = 7 are both prime. MAPLE select(p -> isprime(p) and isprime(2^p - p^2), {2} union {seq(2*i+1, i=1..2000)}); # Robert Israel, Jun 10 2014 MATHEMATICA Select[Prime[Range[300]], PrimeQ[2^# - #^2] &] (* Alonso del Arte, May 27 2014 *) PROG (MAGMA) [p: p in PrimeUpTo(2200) | IsPrime(2^p - p^2)]; CROSSREFS Cf. A098105. Sequence in context: A196670 A075304 A168245 * A128490 A023519 A023517 Adjacent sequences:  A242926 A242927 A242928 * A242930 A242931 A242932 KEYWORD nonn,more AUTHOR Juri-Stepan Gerasimov, May 27 2014 EXTENSIONS a(9) from Alonso del Arte, May 27 2014 a(10) from Alois P. Heinz, May 28 2014 a(11) from Robert Israel, Jun 10 2014 STATUS approved

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Last modified May 18 14:00 EDT 2021. Contains 343995 sequences. (Running on oeis4.)