|
| |
|
|
A068715
|
|
Primes of the form 10*3^k + 1.
|
|
1
| |
|
|
11, 31, 271, 811, 21871, 196831, 5314411, 3874204891, 313810596091, 46383976865881019793281501678905914543189676980091, 2738927449953408337773479392637715347860807235997334411
(list; graph; refs; listen; history; internal format)
|
|
|
|
OFFSET
| 1,1
|
|
|
LINKS
| Vincenzo Librandi, Table of n, a(n) for n = 1..19
|
|
|
EXAMPLE
| 21871 is a member as it is a concatenation of 2187 (=3^7) and 1.
|
|
|
MATHEMATICA
| Select[Table[10*3^n+1, {n, 0, 300}], PrimeQ](* Vincenzo Librandi, Dec 08 2011 *)
|
|
|
PROG
| (MAGMA) [a: n in [0..200] | IsPrime(a) where a is 10*3^n + 1]; // Vincenzo Librandi, Dec 08 2011
|
|
|
CROSSREFS
| Cf. A068712, A068714.
Sequence in context: A093382 A098264 A023279 * A093881 A163763 A201808
Adjacent sequences: A068712 A068713 A068714 * A068716 A068717 A068718
|
|
|
KEYWORD
| nonn
|
|
|
AUTHOR
| Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Mar 05 2002
|
|
|
EXTENSIONS
| More terms from Sascha Kurz (sascha.kurz(AT)uni-bayreuth.de), Mar 17 2002
|
| |
|
|
