| n | a(n) |
|---|---|
| 0 | 2 |
| 1 | -1 |
| 2 | 0 |
| 3 | 1 |
| 4 | 2 |
| 5 | 13 |
| 6 | 80 |
| 7 | 579 |
| 8 | 4738 |
| 9 | 43387 |
| 10 | 439792 |
| 11 | 4890741 |
| 12 | 59216642 |
| 13 | 775596313 |
| 14 | 10927434464 |
| 15 | 164806435783 |
| 16 | 2649391469058 |
| 17 | 45226435601207 |
| 18 | 817056406224416 |
| 19 | 15574618910994665 |
| 20 | 312400218671253762 |
| 21 | 6577618644576902053 |
| 22 | 145051250421230224304 |
| 23 | 3343382818203784146955 |
| 24 | 80399425364623070680706 |
| 25 | 2013619745874493923699123 |
[2,-1,0,1,2,13,80,579,4738,43387,439792,4890741, 59216642,775596313,10927434464,164806435783, 2649391469058,45226435601207,817056406224416, 15574618910994665,312400218671253762, 6577618644576902053,145051250421230224304, 3343382818203784146955,80399425364623070680706, 2013619745874493923699123] |