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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 5 |
| 2 | 63 |
| 3 | 1372 |
| 4 | 41814 |
| 5 | 1605215 |
| 6 | 73586824 |
| 7 | 3906566501 |
| 8 | 235444126392 |
| 9 | 15881634865780 |
| 10 | 1185873283860557 |
| 11 | 97147220190772317 |
| 12 | 8665813010430379775 |
| 13 | 836342349269443514470 |
| 14 | 86843462603384158258103 |
| 15 | 9655074380695222955712860 |
| 16 | 1144404915485406530977640253 |
| 17 | 144066096386630152751096708253 |
| 18 | 19197014710932516253131393942286 |
| 19 | 2699479675453423906131984772100102 |
[1,5,63,1372,41814,1605215,73586824,3906566501, 235444126392,15881634865780,1185873283860557, 97147220190772317,8665813010430379775, 836342349269443514470,86843462603384158258103, 9655074380695222955712860, 1144404915485406530977640253, 144066096386630152751096708253, 19197014710932516253131393942286, 2699479675453423906131984772100102] |