|
Search: id:A138048
|
|
|
| A138048 |
|
Numbers n such that 15^n + 2 is prime. |
|
+0
6
|
|
| 0, 1, 2, 4, 5, 10, 11, 16, 20, 52, 75, 106, 112, 132, 371
(list; graph; listen)
|
|
|
OFFSET
|
1,3
|
|
|
COMMENT
|
One further term a(n) = 10365 was found by Lelio R Paula in 2006 - see the PRP Records link.
|
|
LINKS
|
Henri & Renaud Lifchitz, PRP Records.
|
|
MATHEMATICA
|
Do[ f = 15^n + 2; If[ PrimeQ[ f ], Print[ {n, f} ] ], {n, 1, 371} ]
|
|
CROSSREFS
|
Cf. A051783 = Numbers n such that 3^n + 2 is prime. Cf. A087885 = Numbers n such that 5^n + 2 is prime. Cf. A090649, A109076, A113480, A138049, A138050, A138051, A087886, A138052, A138053, A138054, A138055, A138056, A138057, A138058, A138059, A138060, A113481.
Sequence in context: A125728 A003278 A004792 this_sequence A057762 A109511 A018339
Adjacent sequences: A138045 A138046 A138047 this_sequence A138049 A138050 A138051
|
|
KEYWORD
|
hard,more,nonn
|
|
AUTHOR
|
Alexander Adamchuk (alex(AT)kolmogorov.com), Mar 02 2008
|
|
|
Search completed in 0.002 seconds
|
