n | a(n) |
---|---|
1 | 0 |
2 | 0 |
3 | 3 |
4 | 131 |
5 | 1830 |
6 | 16990 |
7 | 127953 |
8 | 851361 |
9 | 5231460 |
10 | 30459980 |
11 | 170761503 |
12 | 931484191 |
13 | 4979773890 |
14 | 26223530970 |
15 | 136522672653 |
16 | 704553794621 |
17 | 3611494269120 |
18 | 18415268221960 |
19 | 93516225653403 |
20 | 473366777478651 |
21 | 2390054857197150 |
22 | 12043393363764950 |
23 | 60590148885015753 |
[0,0,3,131,1830,16990,127953,851361,5231460, 30459980,170761503,931484191,4979773890, 26223530970,136522672653,704553794621, 3611494269120,18415268221960,93516225653403, 473366777478651,2390054857197150, 12043393363764950,60590148885015753] |