|
Search: id:A122042
|
|
|
| A122042 |
|
Numbers n such that (2^n+n)/(n+2) is prime. |
|
+0
2
|
| |
|
|
OFFSET
|
1,1
|
|
|
COMMENT
|
All terms are also in A081765 = numbers n such that n+2 divides 2^(n-1)-1.
|
|
MATHEMATICA
|
Do[If[PrimeQ[(2^n+n)/(n+2)], Print[n]], {n, 1, 5000}]
|
|
CROSSREFS
|
Cf. A081765.
Adjacent sequences: A122039 A122040 A122041 this_sequence A122043 A122044 A122045
Sequence in context: A106903 A098413 A109504 this_sequence A090258 A088187 A095040
|
|
KEYWORD
|
more,nonn
|
|
AUTHOR
|
Zak Seidov (zakseidov(AT)yahoo.com), Sep 14 2006
|
|
EXTENSIONS
|
a(5) from Alexander Adamchuk (alex(AT)kolmogorov.com), Sep 17 2006
|
|
|
Search completed in 0.002 seconds
|
