The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 6 |
| 3 | 53 |
| 4 | 931 |
| 5 | 21847 |
| 6 | 791525 |
| 7 | 39781921 |
| 8 | 2896348222 |
| 9 | 298603689072 |
| 10 | 43979877929712 |
| 11 | 9234821696038425 |
| 12 | 2765498896234870783 |
| 13 | 1182132922860352133076 |
| 14 | 721128788569371093881079 |
| 15 | 628104461090874688307332589 |
| 16 | 781298529318782688558174387547 |
[1,1,6,53,931,21847,791525,39781921,2896348222, 298603689072,43979877929712,9234821696038425, 2765498896234870783,1182132922860352133076, 721128788569371093881079, 628104461090874688307332589, 781298529318782688558174387547] |