The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 1 |
| 2 | 9 |
| 3 | 10 |
| 4 | 1490839 |
| 5 | 1490849 |
| 6 | 2981688 |
| 7 | 4472537 |
| 8 | 20871836 |
| 9 | 25344373 |
| 10 | 46216209 |
| 11 | 71560582 |
| 12 | 260897955 |
| 13 | 1115152402 |
| 14 | 1376050357 |
| 15 | 2491202759 |
| 16 | 3867253116 |
| 17 | 60499999499 |
[0,1,9,10,1490839,1490849,2981688,4472537, 20871836,25344373,46216209,71560582,260897955, 1115152402,1376050357,2491202759,3867253116, 60499999499] |