|
| |
|
|
A081296
|
|
Primes of the form 2^k - k.
|
|
3
| | |
|
|
|
OFFSET
| 1,1
|
|
|
COMMENTS
| Primes in A000325.
Next term a(9) contains roughly 1000 digits and is too large to include. - R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Jul 15 2007
|
|
|
FORMULA
| a(n)=2^A048744(n)-A048744(n). [From R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Jul 22 2009]
|
|
|
MATHEMATICA
| lst={}; s=1; Do[s+=(n+=s); If[PrimeQ[Abs[s]], AppendTo[lst, s]], {n, 0, 6!}]; lst [From Vladimir Orlovsky (4vladimir(AT)gmail.com), Oct 11 2008]
|
|
|
PROG
| (PARI) { for(k=1, 100000, if(isprime(2^k-k), print(2^k-k) ; ) ; ) ; } - R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Jul 15 2007
|
|
|
CROSSREFS
| Sequence in context: A035128 A138696 A163798 * A133378 A068105 A065588
Adjacent sequences: A081293 A081294 A081295 * A081297 A081298 A081299
|
|
|
KEYWORD
| nonn
|
|
|
AUTHOR
| Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Apr 20 2003
|
|
|
EXTENSIONS
| More terms from R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Jul 15 2007
|
| |
|
|
