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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 10 |
| 3 | 171 |
| 4 | 3060 |
| 5 | 54901 |
| 6 | 985150 |
| 7 | 17677791 |
| 8 | 317215080 |
| 9 | 5692193641 |
| 10 | 102142270450 |
| 11 | 1832868674451 |
| 12 | 32889493869660 |
| 13 | 590178020979421 |
| 14 | 10590314883759910 |
| 15 | 190035489886698951 |
| 16 | 3410048503076821200 |
| 17 | 61190837565496082641 |
| 18 | 1098025027675852666330 |
| 19 | 19703259660599851911291 |
[1,10,171,3060,54901,985150,17677791,317215080, 5692193641,102142270450,1832868674451, 32889493869660,590178020979421,10590314883759910, 190035489886698951,3410048503076821200, 61190837565496082641,1098025027675852666330, 19703259660599851911291] |