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| n | a(n) |
|---|---|
| 1 | 727 |
| 2 | 5623 |
| 3 | 21611 |
| 4 | 131771 |
| 5 | 751691 |
| 6 | 8311687 |
| 7 | 16867447 |
| 8 | 25431851 |
| 9 | 71014331 |
| 10 | 109056251 |
| 11 | 350550731 |
| 12 | 3170478247 |
| 13 | 4435959611 |
| 14 | 4678970407 |
| 15 | 6353205851 |
| 16 | 9659548091 |
| 17 | 11977770247 |
| 18 | 26525659687 |
| 19 | 29365277771 |
| 20 | 39262233611 |
| 21 | 52986054967 |
[727,5623,21611,131771,751691,8311687,16867447, 25431851,71014331,109056251,350550731,3170478247, 4435959611,4678970407,6353205851,9659548091, 11977770247,26525659687,29365277771,39262233611, 52986054967] |