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| n | a(n) |
|---|---|
| 1 | 37 |
| 2 | 43 |
| 3 | 47 |
| 4 | 67 |
| 5 | 73 |
| 6 | 79 |
| 7 | 337 |
| 8 | 409 |
| 9 | 439 |
| 10 | 499 |
| 11 | 607 |
| 12 | 709 |
| 13 | 3637 |
| 14 | 3709 |
| 15 | 4877 |
| 16 | 6997 |
| 17 | 7487 |
| 18 | 9433 |
| 19 | 76963 |
| 20 | 334777 |
[37,43,47,67,73,79,337,409,439,499,607,709,3637, 3709,4877,6997,7487,9433,76963,334777] |