|
| |
|
|
A108849
|
|
Semiprimes whose digit reversal is a nontrivial power.
|
|
0
| |
|
|
4, 9, 46, 94, 121, 169, 215, 526, 961, 982, 1042, 1273, 1405, 1843, 2918, 3194, 4069, 4633, 5213, 5221, 6313, 6511, 6937, 8402, 9235, 9481, 9586, 9886, 10201, 10609, 12538, 12769, 14023, 16171, 16327, 16582, 16723, 18085, 18463, 18811, 27845
(list; graph; refs; listen; history; internal format)
|
|
|
|
OFFSET
| 1,1
|
|
|
COMMENTS
| Some nonsquare brilliant numbers in the sequence: 70597 = 227*311 (79507 = 43^3), 76121 = 163*467 (12167 = 23^3), 211591 = 457*463 (195112 = 58^3), 291149 = 359*811 (941192 = 98^3) ...
|
|
|
EXAMPLE
| 215 is a term because 215 = 5*43 and 512 = 2^9.
|
|
|
CROSSREFS
| Cf. A069798.
Sequence in context: A024053 A197970 A048892 * A025558 A103933 A013495
Adjacent sequences: A108846 A108847 A108848 * A108850 A108851 A108852
|
|
|
KEYWORD
| base,nonn
|
|
|
AUTHOR
| Jason Earls (zevi_35711(AT)yahoo.com), Jul 11 2005
|
| |
|
|
