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| n | a(n) |
|---|---|
| 1 | 39 |
| 2 | 69 |
| 3 | 125 |
| 4 | 221 |
| 5 | 377 |
| 6 | 659 |
| 7 | 1177 |
| 8 | 2119 |
| 9 | 3805 |
| 10 | 6857 |
| 11 | 12437 |
| 12 | 22681 |
| 13 | 41475 |
| 14 | 76011 |
| 15 | 139645 |
| 16 | 257161 |
| 17 | 474439 |
| 18 | 876539 |
| 19 | 1621387 |
| 20 | 3002407 |
| 21 | 5564769 |
| 22 | 10321599 |
| 23 | 19156321 |
| 24 | 35571383 |
| 25 | 66081147 |
| 26 | 122803551 |
| 27 | 228283091 |
| 28 | 424467169 |
| 29 | 789412673 |
| 30 | 1468380739 |
[39,69,125,221,377,659,1177,2119,3805,6857,12437, 22681,41475,76011,139645,257161,474439,876539, 1621387,3002407,5564769,10321599,19156321, 35571383,66081147,122803551,228283091,424467169, 789412673,1468380739] |