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A034785 2^(n-th prime). 23
4, 8, 32, 128, 2048, 8192, 131072, 524288, 8388608, 536870912, 2147483648, 137438953472, 2199023255552, 8796093022208, 140737488355328, 9007199254740992, 576460752303423488, 2305843009213693952 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

These are the "outputs" in Conway's PRIMEGAME (see A007542). - Alonso del Arte, Jan 03 2011

LINKS

Vincenzo Librandi, Table of n, a(n) for n = 1..200

Index to divisibility sequences

EXAMPLE

a(4) = 128 because the fourth prime number is 7 and 2^7 = 128.

MATHEMATICA

2^Prime@Range@40  (* Vladimir Joseph Stephan Orlovsky, Apr 11 2011 *)

PROG

(Haskell)

a034785 n = a034785_list !! (n-1)

a034785_list = map (2 ^) a000040_list  -- Reinhard Zumkeller, Jan 24 2012

(PARI) a(n)=1<<prime(n) \\ Charles R Greathouse IV, Apr 07 2012

(MAGMA) [2^p: p in PrimesUpTo(100)]; // Vincenzo Librandi, Apr 29 2014

CROSSREFS

Cf. A000430, A073718 2^(n-th composite).

Sequence in context: A113479 A103970 A227295 * A247938 A072868 A075398

Adjacent sequences:  A034782 A034783 A034784 * A034786 A034787 A034788

KEYWORD

easy,nonn

AUTHOR

Asher Auel (asher.auel(AT)reed.edu)

EXTENSIONS

More terms from James A. Sellers, Feb 04 2000

STATUS

approved

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Last modified December 21 12:18 EST 2014. Contains 252320 sequences.