n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 4 |
3 | 25 |
4 | 210 |
5 | 2205 |
6 | 27720 |
7 | 405405 |
8 | 6756750 |
9 | 126351225 |
10 | 2618916300 |
11 | 59580345825 |
12 | 1475759335050 |
13 | 39529267903125 |
14 | 1138442915610000 |
15 | 35078272337233125 |
16 | 1151392703775063750 |
17 | 40106845848164720625 |
18 | 1477620636511331812500 |
19 | 57405561728465240915625 |
[1,1,4,25,210,2205,27720,405405,6756750,126351225, 2618916300,59580345825,1475759335050, 39529267903125,1138442915610000,35078272337233125, 1151392703775063750,40106845848164720625, 1477620636511331812500,57405561728465240915625] |