The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 5 |
| 3 | 55 |
| 4 | 849 |
| 5 | 17641 |
| 6 | 462373 |
| 7 | 14651295 |
| 8 | 545025281 |
| 9 | 23291218801 |
| 10 | 1124589371301 |
| 11 | 60553038168679 |
| 12 | 3597677815336465 |
| 13 | 233810179507710105 |
| 14 | 16499939198003013509 |
| 15 | 1256544674435523638671 |
| 16 | 102713141497515307408257 |
| 17 | 8970278754666722087785825 |
[1,1,5,55,849,17641,462373,14651295,545025281, 23291218801,1124589371301,60553038168679, 3597677815336465,233810179507710105, 16499939198003013509,1256544674435523638671, 102713141497515307408257, 8970278754666722087785825] |