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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 1 |
| 2 | 41 |
| 3 | 1641 |
| 4 | 65641 |
| 5 | 2625641 |
| 6 | 105025641 |
| 7 | 4201025641 |
| 8 | 168041025641 |
| 9 | 6721641025641 |
| 10 | 268865641025641 |
| 11 | 10754625641025641 |
| 12 | 430185025641025641 |
| 13 | 17207401025641025641 |
| 14 | 688296041025641025641 |
| 15 | 27531841641025641025641 |
| 16 | 1101273665641025641025641 |
| 17 | 44050946625641025641025641 |
[0,1,41,1641,65641,2625641,105025641,4201025641, 168041025641,6721641025641,268865641025641, 10754625641025641,430185025641025641, 17207401025641025641,688296041025641025641, 27531841641025641025641,1101273665641025641025641, 44050946625641025641025641] |