The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 7 |
| 3 | 154 |
| 4 | 4681 |
| 5 | 228076 |
| 6 | 14299129 |
| 7 | 1138327282 |
| 8 | 108153498625 |
| 9 | 11945906543512 |
| 10 | 1500579818594641 |
| 11 | 210620216812835446 |
| 12 | 32619162944121580369 |
| 13 | 5512919937646519781956 |
| 14 | 1007971183370936380058233 |
| 15 | 197907153405452704613136466 |
| 16 | 41467801090663272520003650049 |
[1,1,7,154,4681,228076,14299129,1138327282, 108153498625,11945906543512,1500579818594641, 210620216812835446,32619162944121580369, 5512919937646519781956,1007971183370936380058233, 197907153405452704613136466, 41467801090663272520003650049] |