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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 3 |
| 3 | 31 |
| 4 | 34 |
| 5 | 99 |
| 6 | 133 |
| 7 | 498 |
| 8 | 631 |
| 9 | 1129 |
| 10 | 19824 |
| 11 | 20953 |
| 12 | 187448 |
| 13 | 583297 |
| 14 | 770745 |
| 15 | 1354042 |
| 16 | 3478829 |
| 17 | 4832871 |
| 18 | 13144571 |
| 19 | 70555726 |
| 20 | 365923201 |
| 21 | 436478927 |
| 22 | 11714375303 |
| 23 | 12150854230 |
| 24 | 72468646453 |
| 25 | 374494086495 |
| 26 | 821456819443 |
| 27 | 1195950905938 |
| 28 | 3213358631319 |
| 29 | 4409309537257 |
[1,1,3,31,34,99,133,498,631,1129,19824,20953, 187448,583297,770745,1354042,3478829,4832871, 13144571,70555726,365923201,436478927,11714375303, 12150854230,72468646453,374494086495,821456819443, 1195950905938,3213358631319,4409309537257] |