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| n | a(n) |
|---|---|
| 0 | 20 |
| 1 | 21 |
| 2 | 62 |
| 3 | 145 |
| 4 | 1367 |
| 5 | 1512 |
| 6 | 19511 |
| 7 | 21023 |
| 8 | 208718 |
| 9 | 438459 |
| 10 | 1085636 |
| 11 | 1524095 |
| 12 | 62049436 |
| 13 | 63573531 |
| 14 | 189196498 |
| 15 | 441966527 |
| 16 | 4166895241 |
| 17 | 4608861768 |
| 18 | 59473236457 |
| 19 | 64082098225 |
| 20 | 636212120482 |
| 21 | 1336506339189 |
[20,21,62,145,1367,1512,19511,21023,208718,438459, 1085636,1524095,62049436,63573531,189196498, 441966527,4166895241,4608861768,59473236457, 64082098225,636212120482,1336506339189] |