n | a(n) |
---|---|
0 | 1 |
1 | 27 |
2 | 377 |
3 | 3627 |
4 | 27026 |
5 | 166230 |
6 | 878409 |
7 | 4098483 |
8 | 17222607 |
9 | 66165501 |
10 | 235124461 |
11 | 780112671 |
12 | 2435132466 |
13 | 7196829486 |
14 | 20245295242 |
15 | 54455027238 |
16 | 140596223184 |
17 | 349621224120 |
18 | 839832229131 |
19 | 1953829030737 |
20 | 4412447681628 |
21 | 9693085025844 |
[1,27,377,3627,27026,166230,878409,4098483, 17222607,66165501,235124461,780112671,2435132466, 7196829486,20245295242,54455027238,140596223184, 349621224120,839832229131,1953829030737, 4412447681628,9693085025844] |