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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 3 |
| 3 | 6 |
| 4 | 14 |
| 5 | 71 |
| 6 | 427 |
| 7 | 434 |
| 8 | 1738 |
| 9 | 15643 |
| 10 | 156431 |
| 11 | 156442 |
| 12 | 938654 |
| 13 | 12202503 |
| 14 | 170835043 |
| 15 | 2562525646 |
| 16 | 20500205170 |
| 17 | 348503487891 |
| 18 | 2091020927349 |
| 19 | 39729397619632 |
| 20 | 198646988098164 |
| 21 | 1390528916687151 |
| 22 | 30591636167117323 |
| 23 | 703607631843698430 |
[1,3,6,14,71,427,434,1738,15643,156431,156442, 938654,12202503,170835043,2562525646,20500205170, 348503487891,2091020927349,39729397619632, 198646988098164,1390528916687151, 30591636167117323,703607631843698430] |