|
Search: id:A006552
|
|
|
| A006552 |
|
Numbers n such that n*3^n + 1 is prime.
(Formerly M1848)
|
|
+0
2
|
|
| 2, 8, 32, 54, 114, 414, 1400, 1850, 2848, 4874, 7268, 19290, 337590
(list; graph; listen)
|
|
|
OFFSET
|
1,1
|
|
|
REFERENCES
|
N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).
H. Dubner, Generalized Cullen numbers, J. Rec. Math., 21 (No. 3, 1989), 190-191.
|
|
LINKS
|
G. Loeh, Generalized Cullen primes
|
|
CROSSREFS
|
Sequence in context: A071387 A071389 A026369 this_sequence A134753 A052481 A067897
Adjacent sequences: A006549 A006550 A006551 this_sequence A006553 A006554 A006555
|
|
KEYWORD
|
nonn,hard
|
|
AUTHOR
|
N. J. A. Sloane (njas(AT)research.att.com).
|
|
EXTENSIONS
|
More terms from Herman Jamke (hermanjamke(AT)fastmail.fm), Jan 05 2008
|
|
|
Search completed in 0.002 seconds
|
