The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 73 |
| 3 | 1537 |
| 4 | 30940 |
| 5 | 706153 |
| 6 | 15034832 |
| 7 | 322715244 |
| 8 | 6984694296 |
| 9 | 150562726618 |
| 10 | 3245505223710 |
| 11 | 70004837612015 |
| 12 | 1509763068769076 |
| 13 | 32557618945328577 |
| 14 | 702121520920633674 |
| 15 | 15141824337674655027 |
| 16 | 326544294704293876446 |
[1,73,1537,30940,706153,15034832,322715244, 6984694296,150562726618,3245505223710, 70004837612015,1509763068769076,32557618945328577, 702121520920633674,15141824337674655027, 326544294704293876446] |