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| n | a(n) |
|---|---|
| 1 | 96 |
| 2 | 642 |
| 3 | 3132 |
| 4 | 16296 |
| 5 | 77353 |
| 6 | 337570 |
| 7 | 1459711 |
| 8 | 6131600 |
| 9 | 25014797 |
| 10 | 100647020 |
| 11 | 399073108 |
| 12 | 1561490768 |
| 13 | 6050110218 |
| 14 | 23239177456 |
| 15 | 88590795541 |
| 16 | 335553550058 |
| 17 | 1263942149575 |
| 18 | 4737487677280 |
| 19 | 17680474805387 |
| 20 | 65735112648424 |
[96,642,3132,16296,77353,337570,1459711,6131600, 25014797,100647020,399073108,1561490768, 6050110218,23239177456,88590795541,335553550058, 1263942149575,4737487677280,17680474805387, 65735112648424] |