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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 1 |
| 2 | 4608 |
| 3 | 826686 |
| 4 | 34078720 |
| 5 | 615234375 |
| 6 | 6560580096 |
| 7 | 48585742828 |
| 8 | 275414777856 |
| 9 | 1272676306365 |
| 10 | 5005000000000 |
| 11 | 17274324784266 |
| 12 | 53527561371648 |
| 13 | 151506482542051 |
| 14 | 397002013954560 |
| 15 | 973385859375000 |
| 16 | 2252349569499136 |
[0,1,4608,826686,34078720,615234375,6560580096, 48585742828,275414777856,1272676306365, 5005000000000,17274324784266,53527561371648, 151506482542051,397002013954560,973385859375000, 2252349569499136] |