|
Search: id:A139442
|
|
|
| A139442 |
|
Numbers n such that primorial(n)/2 - 8 is prime. |
|
+0
24
|
|
| 2, 3, 4, 7, 9, 10, 11, 13, 15, 22, 23, 29, 45, 51, 52, 55, 69, 98, 122, 157, 268, 367, 476, 481
(list; graph; listen)
|
|
|
OFFSET
|
1,1
|
|
|
MATHEMATICA
|
k = 1; a = {}; Do[k = k*Prime[n]; If[PrimeQ[k - 8], Print[n]; AppendTo[a, n]], {n, 2, 481}]; 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: A141489 A060253 A066276 this_sequence A047340 A096118 A050029
Adjacent sequences: A139439 A139440 A139441 this_sequence A139443 A139444 A139445
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
Artur Jasinski (grafix(AT)csl.pl), Apr 21 2008
|
|
|
Search completed in 0.002 seconds
|
