n | a(n) |
---|---|
0 | 0 |
1 | 2 |
2 | 14 |
3 | 84 |
4 | 492 |
5 | 2870 |
6 | 16730 |
7 | 97512 |
8 | 568344 |
9 | 3312554 |
10 | 19306982 |
11 | 112529340 |
12 | 655869060 |
13 | 3822685022 |
14 | 22280241074 |
15 | 129858761424 |
16 | 756872327472 |
17 | 4411375203410 |
18 | 25711378892990 |
19 | 149856898154532 |
20 | 873430010034204 |
21 | 5090723162050694 |
22 | 29670908962269962 |
23 | 172934730611569080 |
[0,2,14,84,492,2870,16730,97512,568344,3312554, 19306982,112529340,655869060,3822685022, 22280241074,129858761424,756872327472, 4411375203410,25711378892990,149856898154532, 873430010034204,5090723162050694, 29670908962269962,172934730611569080] |