n | a(n) |
---|---|
0 | 0 |
1 | 1 |
2 | 3 |
3 | 11 |
4 | 47 |
5 | 240 |
6 | 1448 |
7 | 10149 |
8 | 81213 |
9 | 730951 |
10 | 7309565 |
11 | 80405304 |
12 | 964863792 |
13 | 12543229529 |
14 | 175605213783 |
15 | 2634078207355 |
16 | 42145251318667 |
17 | 716469272418936 |
18 | 12896446903543432 |
19 | 245032491167329389 |
20 | 4900649823346594545 |
[0,1,3,11,47,240,1448,10149,81213,730951,7309565, 80405304,964863792,12543229529,175605213783, 2634078207355,42145251318667,716469272418936, 12896446903543432,245032491167329389, 4900649823346594545] |