login
This site is supported by donations to The OEIS Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A132829 Numbers k such that 3^k + 2 is not prime. 1
5, 6, 7, 9, 11, 12, 13, 16, 17, 18, 19, 20, 21, 22, 23, 25, 27, 28, 29, 30, 31, 32, 33, 34, 35, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..71.

MATHEMATICA

a = {}; c = 3^x + 2; Do[If[PrimeQ[c], 0, AppendTo[a, x]], {x, 0, 100}]; a

PROG

(MAGMA) [n: n in [0..100]| not IsPrime(3^n+2)] // Vincenzo Librandi, Jan 28 2011

CROSSREFS

Cf. A057735, A051783.

Sequence in context: A089192 A279195 A232710 * A180061 A196029 A096820

Adjacent sequences:  A132826 A132827 A132828 * A132830 A132831 A132832

KEYWORD

nonn

AUTHOR

Artur Jasinski, Sep 03 2007

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 21 07:08 EDT 2019. Contains 327253 sequences. (Running on oeis4.)