The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 2 |
| 3 | 5 |
| 4 | 76 |
| 5 | 157 |
| 6 | 470 |
| 7 | 2839 |
| 8 | 723752 |
| 9 | 24660295 |
| 10 | 814014962 |
| 11 | 50504034347 |
| 12 | 9849242735372 |
| 13 | 59103102606341 |
| 14 | 7623954457524682 |
| 15 | 2686000485322777549 |
| 16 | 10353907366994100404464 |
| 17 | 5321713809402035561782157 |
| 18 | 303330306424081172196809854 |
| 19 | 398574373986665618859496010447 |
| 20 | 2696377138892109703091196777892892 |
[1,2,5,76,157,470,2839,723752,24660295,814014962, 50504034347,9849242735372,59103102606341, 7623954457524682,2686000485322777549, 10353907366994100404464,5321713809402035561782157, 303330306424081172196809854, 398574373986665618859496010447, 2696377138892109703091196777892892] |