The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 5 |
| 3 | 41 |
| 4 | 459 |
| 5 | 6033 |
| 6 | 88055 |
| 7 | 1379405 |
| 8 | 22763356 |
| 9 | 390859501 |
| 10 | 6924877318 |
| 11 | 125837754305 |
| 12 | 2335060741480 |
| 13 | 44097660919285 |
| 14 | 845336236860344 |
| 15 | 16415016380975679 |
| 16 | 322349248087651458 |
| 17 | 6392828942756895663 |
[1,5,41,459,6033,88055,1379405,22763356,390859501, 6924877318,125837754305,2335060741480, 44097660919285,845336236860344,16415016380975679, 322349248087651458,6392828942756895663] |