n | a(n) |
---|---|
1 | 0 |
2 | 0 |
3 | 7 |
4 | 54 |
5 | 484 |
6 | 4233 |
7 | 35394 |
8 | 293201 |
9 | 2464565 |
10 | 20943953 |
11 | 179718000 |
12 | 1556469349 |
13 | 13597962107 |
14 | 119731244640 |
15 | 1061769557793 |
16 | 9476573902533 |
17 | 85076550195696 |
18 | 767846949916102 |
[0,0,7,54,484,4233,35394,293201,2464565,20943953, 179718000,1556469349,13597962107,119731244640, 1061769557793,9476573902533,85076550195696, 767846949916102] |