The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 66 |
| 2 | 3366 |
| 3 | 154836 |
| 4 | 6735366 |
| 5 | 282885372 |
| 6 | 11598300252 |
| 7 | 467245810152 |
| 8 | 18573020953542 |
| 9 | 730538824172652 |
| 10 | 28491014142733428 |
| 11 | 1103379274982221848 |
| 12 | 42480102086815541148 |
| 13 | 1627314679941087653208 |
| 14 | 62070431363467200486648 |
| 15 | 2358676391811753618492624 |
| 16 | 89334868339870168300408134 |
[1,66,3366,154836,6735366,282885372,11598300252, 467245810152,18573020953542,730538824172652, 28491014142733428,1103379274982221848, 42480102086815541148,1627314679941087653208, 62070431363467200486648,2358676391811753618492624, 89334868339870168300408134] |