n | a(n) |
---|---|
1 | 1 |
2 | 3 |
3 | 21 |
4 | 231 |
5 | 3495 |
6 | 67455 |
7 | 1584765 |
8 | 43897455 |
9 | 1400923755 |
10 | 50619052575 |
11 | 2042745514425 |
12 | 91066568444775 |
13 | 4444738893770175 |
14 | 235731740255186175 |
15 | 13499365993279291125 |
16 | 830161812269496081375 |
17 | 54564569247212367217875 |
18 | 3817309552613869238301375 |
[1,3,21,231,3495,67455,1584765,43897455, 1400923755,50619052575,2042745514425, 91066568444775,4444738893770175, 235731740255186175,13499365993279291125, 830161812269496081375,54564569247212367217875, 3817309552613869238301375] |