|
| |
|
|
A085703
|
|
a(1)=4, then least semiprime > a(n-1) such that when all in the sequence are concatenated together they form a prime.
|
|
0
| |
|
|
4, 21, 39, 49, 93, 161, 183, 201, 411, 543, 1003, 1043, 1387, 1389, 1527, 1589, 2509, 2519, 2559, 2881, 4143, 4613, 4821, 5251, 6821, 7123, 7671, 7679, 8373, 9993, 11463, 13201, 13349, 13647, 14349, 17617, 17753, 18931, 19253
(list; graph; refs; listen; history; internal format)
|
| |
| |
|
|
