

A262972


Numbers n such that 4^n + 33 is prime.


1



1, 3, 6, 7, 10, 15, 30, 34, 54, 58, 103, 105, 205, 223, 279, 741, 2098, 3523, 9210, 37674, 89895, 101509
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OFFSET

1,2


COMMENTS

Contains exactly the halved even terms of A247953.


LINKS

Table of n, a(n) for n=1..22.


MATHEMATICA

Select[Range[0, 250000], PrimeQ[4^# + 33] &]


PROG

(MAGMA) [n: n in [0..700]  IsPrime(4^n+33)]; // Vincenzo Librandi, Oct 06 2015
(PARI) for(n=1, 1e3, if(isprime(4^n+33), print1(n", "))) \\ Altug Alkan, Oct 06 2015


CROSSREFS

Cf. A247953.
Cf. similar sequences of the type "Numbers n such that 4^n+k is prime" listed in A253772.
Sequence in context: A285569 A024412 A255508 * A115127 A258354 A292608
Adjacent sequences: A262969 A262970 A262971 * A262973 A262974 A262975


KEYWORD

nonn,more


AUTHOR

Robert Price, Oct 05 2015


STATUS

approved



