The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 13 |
| 3 | 469 |
| 4 | 63577 |
| 5 | 33231721 |
| 6 | 68519123173 |
| 7 | 562469619451069 |
| 8 | 18442242396353040817 |
| 9 | 2417685638793025070212561 |
| 10 | 1267626422541873052658376446653 |
| 11 | 2658442047546208031914776455678477989 |
| 12 | 22300713297142388711251601783864453690641417 |
[1,1,13,469,63577,33231721,68519123173, 562469619451069,18442242396353040817, 2417685638793025070212561, 1267626422541873052658376446653, 2658442047546208031914776455678477989, 22300713297142388711251601783864453690641417] |