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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 2 |
| 3 | 16 |
| 4 | 272 |
| 5 | 7936 |
| 6 | 353792 |
| 7 | 22368256 |
| 8 | 1903757312 |
| 9 | 209865342976 |
| 10 | 29088885112832 |
| 11 | 4951498053124096 |
| 12 | 1015423886506852352 |
| 13 | 246921480190207983616 |
| 14 | 70251601603943959887872 |
| 15 | 23119184187809597841473536 |
| 16 | 8713962757125169296170811392 |
| 17 | 3729407703720529571097509625856 |
[1,2,16,272,7936,353792,22368256,1903757312, 209865342976,29088885112832,4951498053124096, 1015423886506852352,246921480190207983616, 70251601603943959887872, 23119184187809597841473536, 8713962757125169296170811392, 3729407703720529571097509625856] |