|
Search: id:A139452
|
|
|
| A139452 |
|
Numbers n such that primorial(n)/2 - 256 is prime. |
|
+0
24
|
| |
|
|
OFFSET
|
1,1
|
|
|
MATHEMATICA
|
k = 1; a = {}; Do[k = k*Prime[n]; If[PrimeQ[k - 256], Print[n]; AppendTo[a, n]], {n, 2, 325}]; a (*Artur Jasinski*)
|
|
CROSSREFS
|
Cf. A067026, A067027, A139439, A139440, A139441, A139442, A139443, A139444, A139445, A139446, A139447, A139448, A139449, A139450, A139451, A139452, A139453, A139454, A139455, A139456, A139457, A103514.
Sequence in context: A025073 A134580 A007749 this_sequence A063506 A084438 A143037
Adjacent sequences: A139449 A139450 A139451 this_sequence A139453 A139454 A139455
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
Artur Jasinski (grafix(AT)csl.pl), Apr 21 2008
|
|
|
Search completed in 0.002 seconds
|
