n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 7 |
3 | 36 |
4 | 249 |
5 | 2190 |
6 | 23535 |
7 | 299880 |
8 | 4426065 |
9 | 74294010 |
10 | 1397669175 |
11 | 29123671500 |
12 | 665718201225 |
13 | 16560190196550 |
14 | 445300709428575 |
15 | 12869793995058000 |
16 | 397815487883438625 |
17 | 13095523164781307250 |
18 | 457362512442763302375 |
19 | 16890682269050394304500 |
[1,2,7,36,249,2190,23535,299880,4426065,74294010, 1397669175,29123671500,665718201225, 16560190196550,445300709428575,12869793995058000, 397815487883438625,13095523164781307250, 457362512442763302375,16890682269050394304500] |