login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A078583 Numbers n such that 2^n - prime(n) is prime. 1
3, 11, 19, 24, 26, 61, 96, 175, 189, 312, 483, 741, 4741, 7082, 8421, 10695, 14802, 18824, 18892, 20655, 21653, 39937 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Next term is greater than 50000 - Sam Handler (sam_5_5_5_0(AT)yahoo.com), Dec 05 2004

LINKS

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

MATHEMATICA

Do[ If[ PrimeQ[2^n - Prime[n]], Print[n]], {n, 1, 10^5}]

CROSSREFS

Cf. A077375.

Sequence in context: A071916 A113295 A043433 * A017101 A112422 A289840

Adjacent sequences:  A078580 A078581 A078582 * A078584 A078585 A078586

KEYWORD

nonn

AUTHOR

Robert G. Wilson v, Nov 30 2002

EXTENSIONS

More terms from Sam Handler (sam_5_5_5_0(AT)yahoo.com), Dec 05 2004

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified September 29 12:15 EDT 2020. Contains 337431 sequences. (Running on oeis4.)