The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 1 |
| 3 | 13 |
| 4 | 41 |
| 5 | 671 |
| 6 | 73 |
| 7 | 597871 |
| 8 | 7913 |
| 9 | 28009 |
| 10 | 792451 |
| 11 | 170549237 |
| 12 | 19397633 |
| 13 | 317733228541 |
| 14 | 9860686403 |
| 15 | 75397891 |
| 16 | 170314355593 |
| 17 | 2084647712458321 |
| 18 | 29327731093 |
| 19 | 168856464709124011 |
| 20 | 3063310184201 |
| 21 | 499338236699611 |
| 22 | 535201577273701757 |
| 23 | 23571643935246013553 |
[1,1,13,41,671,73,597871,7913,28009,792451, 170549237,19397633,317733228541,9860686403, 75397891,170314355593,2084647712458321, 29327731093,168856464709124011,3063310184201, 499338236699611,535201577273701757, 23571643935246013553] |