The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 1 |
| 3 | 5 |
| 4 | 7 |
| 5 | 7 |
| 6 | 11 |
| 7 | 143 |
| 8 | 715 |
| 9 | 2431 |
| 10 | 4199 |
| 11 | 29393 |
| 12 | 52003 |
| 13 | 37145 |
| 14 | 7429 |
| 15 | 215441 |
| 16 | 392863 |
| 17 | 4321493 |
| 18 | 7960645 |
| 19 | 58908773 |
| 20 | 109402007 |
| 21 | 407771117 |
| 22 | 762354697 |
| 23 | 3811773485 |
| 24 | 35830670759 |
| 25 | 19293438101 |
| 26 | 327988447717 |
| 27 | 2483341104143 |
| 28 | 4709784852685 |
| 29 | 17897182440203 |
| 30 | 34062379482967 |
[1,1,1,5,7,7,11,143,715,2431,4199,29393,52003, 37145,7429,215441,392863,4321493,7960645,58908773, 109402007,407771117,762354697,3811773485, 35830670759,19293438101,327988447717, 2483341104143,4709784852685,17897182440203, 34062379482967] |