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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 722 |
| 2 | 95114 |
| 3 | 4941482 |
| 4 | 139812146 |
| 5 | 2536445090 |
| 6 | 32623054074 |
| 7 | 318600947898 |
| 8 | 2483404453602 |
| 9 | 16043159708402 |
| 10 | 88446424687338 |
| 11 | 425876551595850 |
| 12 | 1824737078598930 |
| 13 | 7063733943229890 |
| 14 | 25016787780937050 |
| 15 | 81908144381403738 |
| 16 | 250110373959753666 |
| 17 | 717585377719006482 |
[1,722,95114,4941482,139812146,2536445090, 32623054074,318600947898,2483404453602, 16043159708402,88446424687338,425876551595850, 1824737078598930,7063733943229890, 25016787780937050,81908144381403738, 250110373959753666,717585377719006482] |