|
| |
|
|
A083020
|
|
Prime factors of 3^(3^n)+2.
|
|
0
| |
|
|
5, 29, 5, 31, 127, 11, 693236134999, 5, 15679, 2372959, 5945531, 3312453269, 121032673159, 87189642485960958202911070585860771696964072404731750085525219437990967093723439943475549906831683116791055225665629
(list; graph; refs; listen; history; internal format)
|
|
|
|
OFFSET
| 0,1
|
|
|
COMMENTS
| The last entry is 3^(3^5)+2, a probable prime. Conjecture: These numbers have no repeating factors or 3^(3^n)+2 is squarefree.
The Magma Calculator (http://magma.maths.usyd.edu.au/calc/) confirms that the term given above for a(13) is, in fact, prime. [From Jon E. Schoenfield (jonscho(AT)hiwaay.net), Aug 24 2009]
|
|
|
CROSSREFS
| Sequence in context: A125137 A132550 A154587 * A033503 A181616 A057206
Adjacent sequences: A083017 A083018 A083019 * A083021 A083022 A083023
|
|
|
KEYWORD
| easy,nonn
|
|
|
AUTHOR
| Cino Hilliard (hillcino368(AT)gmail.com), May 31 2003
|
|
|
EXTENSIONS
| Corrected by T. D. Noe (noe(AT)sspectra.com), Nov 15 2006
|
| |
|
|
