n | a(n) |
---|---|
3 | 15 |
4 | 60 |
5 | 450 |
6 | 4500 |
7 | 55125 |
8 | 793800 |
9 | 13097700 |
10 | 243243000 |
11 | 5016886875 |
12 | 113716102500 |
13 | 2808787731750 |
14 | 75071235739500 |
15 | 2158298027510625 |
16 | 66409170077250000 |
17 | 2177272076104125000 |
18 | 75769068248423550000 |
19 | 2789248824895091934375 |
20 | 108288483790044745687500 |
[15,60,450,4500,55125,793800,13097700,243243000, 5016886875,113716102500,2808787731750, 75071235739500,2158298027510625,66409170077250000, 2177272076104125000,75769068248423550000, 2789248824895091934375,108288483790044745687500] |