|
| |
|
|
A094474
|
|
a(n) is the largest prime factor of 2^n+3^n.
|
|
5
| |
|
|
5, 13, 7, 97, 11, 61, 463, 401, 577, 4621, 35839, 5521, 4057, 369181, 241, 14177, 7039, 181, 555029, 3121, 92233, 2414250301, 13249, 41432641, 513101, 13761229, 377604937, 3001769, 148466603, 24001, 22674269, 1607133116929, 22270249
(list; graph; refs; listen; history; internal format)
|
|
|
|
OFFSET
| 1,1
|
|
|
EXAMPLE
| n=100, 2^100+3^100=41.97.281.3121.742801.20017001.9937984196743741414107401 so a[100]=9937984196743741414107401.
|
|
|
MATHEMATICA
| Table[Part[Reverse[Flatten[FactorInteger[2^w + 3^w]]], 2], {w, 1, 100}]
|
|
|
CROSSREFS
| Sequence in context: A068530 A088315 A138296 * A064109 A175484 A156682
Adjacent sequences: A094471 A094472 A094473 * A094475 A094476 A094477
|
|
|
KEYWORD
| nonn
|
|
|
AUTHOR
| Labos E. (labos(AT)ana.sote.hu), Jun 01 2004
|
| |
|
|
