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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 31 |
| 3 | 318 |
| 4 | 3605 |
| 5 | 39851 |
| 6 | 441912 |
| 7 | 4896043 |
| 8 | 54248371 |
| 9 | 601050906 |
| 10 | 6659404865 |
| 11 | 73783381595 |
| 12 | 817488259440 |
| 13 | 9057417947527 |
| 14 | 100352286120727 |
| 15 | 1111860046543146 |
| 16 | 12318929680916909 |
| 17 | 136488426454208783 |
| 18 | 1512232882805726640 |
[1,31,318,3605,39851,441912,4896043,54248371, 601050906,6659404865,73783381595,817488259440, 9057417947527,100352286120727,1111860046543146, 12318929680916909,136488426454208783, 1512232882805726640] |