| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 10 |
| 2 | 115 |
| 3 | 1360 |
| 4 | 16265 |
| 5 | 195660 |
| 6 | 2361925 |
| 7 | 28577440 |
| 8 | 346316645 |
| 9 | 4201744870 |
| 10 | 51023399190 |
| 11 | 620022989200 |
| 12 | 7538489480075 |
| 13 | 91696845873760 |
| 14 | 1115794688036920 |
| 15 | 13581508654978560 |
| 16 | 165357977228808925 |
| 17 | 2013721466517360650 |
[1,10,115,1360,16265,195660,2361925,28577440, 346316645,4201744870,51023399190,620022989200, 7538489480075,91696845873760,1115794688036920, 13581508654978560,165357977228808925, 2013721466517360650] |