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 A057733 Primes of the form 2^n + 3. 33
 5, 7, 11, 19, 67, 131, 4099, 32771, 65539, 262147, 268435459, 1073741827, 36028797018963971, 147573952589676412931, 19342813113834066795298819, 431359146674410236714672241392314090778194310760649159697657763987459 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS Robert Israel, Table of n, a(n) for n = 1..25 MAPLE for n from 1 to 2000 do `if`(isprime(2^n + 3)=true, 2^n + 3, NULL) od; # alternative: select(isprime, [seq(2^n+3, n=1..2000)]); # Robert Israel, Dec 28 2015 MATHEMATICA Select[Table[2^n + 3, {n, 230}], PrimeQ] (* Jayanta Basu, May 23 2013 *) PROG (MAGMA) [ a: n in [0..250] | IsPrime(a) where a is 2^n+3 ] // Vincenzo Librandi, Aug 07 2010 (PARI) for(n=1, 99, if(ispseudoprime(t=2^n+3), print1(t", "))) \\ Charles R Greathouse IV, Jul 02 2013 CROSSREFS Cf. A057732. Sequence in context: A190359 A045441 A128841 * A318078 A174332 A248595 Adjacent sequences:  A057730 A057731 A057732 * A057734 A057735 A057736 KEYWORD nonn AUTHOR G. L. Honaker, Jr., Oct 29 2000 EXTENSIONS More terms from Francois Jooste (pin(AT)myway.com), Mar 17 2003 STATUS approved

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Last modified October 14 17:31 EDT 2019. Contains 328022 sequences. (Running on oeis4.)