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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 5 |
| 3 | 60 |
| 4 | 745 |
| 5 | 7298 |
| 6 | 62303 |
| 7 | 496884 |
| 8 | 3767599 |
| 9 | 27544383 |
| 10 | 195862137 |
| 11 | 1362432578 |
| 12 | 9309699590 |
| 13 | 62681109851 |
| 14 | 416796696040 |
| 15 | 2742095941841 |
| 16 | 17874537516228 |
| 17 | 115580492689760 |
| 18 | 742070620542530 |
| 19 | 4734351638158905 |
| 20 | 30034414798026318 |
[0,5,60,745,7298,62303,496884,3767599,27544383, 195862137,1362432578,9309699590,62681109851, 416796696040,2742095941841,17874537516228, 115580492689760,742070620542530,4734351638158905, 30034414798026318] |