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!)
A195530 Primes of the form 3*2^n - 2*n - 1. 0
2, 3, 7, 17, 179, 751, 6121, 12263, 49123, 393181, 50331599, 201326539, 13194139533227, 56668397794435742564203, 1856910058928070412348686157, 8769009823985417509222108996297698117935595257533, 4597486622597666575075041081450927550856217366550806167 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Generated by n = 0, 1, 2, 3, 6, 8, 11, 12, 14, 17, 24, 42, 74, 89, 161, 180,...

LINKS

Table of n, a(n) for n=1..17.

FORMULA

prime: A007283(n)-A005408(n).

MATHEMATICA

Select[Table[3 2^n-2n-1, {n, 0, 200}], PrimeQ] (* Harvey P. Dale, May 24 2012 *)

CROSSREFS

Cf. A005408, A007505, A007283.

Sequence in context: A330726 A059801 A102226 * A295509 A225747 A058334

Adjacent sequences:  A195527 A195528 A195529 * A195531 A195532 A195533

KEYWORD

nonn

AUTHOR

Juri-Stepan Gerasimov, Sep 21 2011

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 February 24 17:00 EST 2020. Contains 332209 sequences. (Running on oeis4.)