n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 3 |
3 | 13 |
4 | 75 |
5 | 541 |
6 | 4683 |
7 | 47293 |
8 | 545835 |
9 | 7087261 |
10 | 102247563 |
11 | 1520385010 |
12 | 23523325304 |
13 | 380789137336 |
14 | 6467270373536 |
15 | 115360990236256 |
16 | 2161133759447744 |
17 | 42490485277902688 |
18 | 875847933546165968 |
19 | 18903517993567133752 |
20 | 426618313415065361204 |
21 | 10043227358229156346032 |
[1,1,3,13,75,541,4683,47293,545835,7087261, 102247563,1520385010,23523325304,380789137336, 6467270373536,115360990236256,2161133759447744, 42490485277902688,875847933546165968, 18903517993567133752,426618313415065361204, 10043227358229156346032] |