The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 14 |
| 2 | 429 |
| 3 | 16796 |
| 4 | 742900 |
| 5 | 35357670 |
| 6 | 1767263190 |
| 7 | 91482563640 |
| 8 | 4861946401452 |
| 9 | 263747951750360 |
| 10 | 14544636039226909 |
| 11 | 812944042149730764 |
| 12 | 45950804324621742364 |
| 13 | 2622127042276492108820 |
| 14 | 150853479205085351660700 |
| 15 | 8740328711533173390046320 |
| 16 | 509552245179617138054608572 |
| 17 | 29869166945772625950142417512 |
[1,14,429,16796,742900,35357670,1767263190, 91482563640,4861946401452,263747951750360, 14544636039226909,812944042149730764, 45950804324621742364,2622127042276492108820, 150853479205085351660700, 8740328711533173390046320, 509552245179617138054608572, 29869166945772625950142417512] |