n | a(n) |
---|---|
0 | 0 |
1 | 1 |
2 | 20 |
3 | 350 |
4 | 6000 |
5 | 102500 |
6 | 1750000 |
7 | 29875000 |
8 | 510000000 |
9 | 8706250000 |
10 | 148625000000 |
11 | 2537187500000 |
12 | 43312500000000 |
13 | 739390625000000 |
14 | 12622187500000000 |
15 | 215474218750000000 |
16 | 3678375000000000000 |
[0,1,20,350,6000,102500,1750000,29875000, 510000000,8706250000,148625000000,2537187500000, 43312500000000,739390625000000,12622187500000000, 215474218750000000,3678375000000000000] |