n | a(n) |
---|---|
1 | 1 |
2 | 1 |
3 | 3 |
4 | 9 |
5 | 34 |
6 | 139 |
7 | 643 |
8 | 3198 |
9 | 17186 |
10 | 98438 |
11 | 598551 |
12 | 3842893 |
13 | 25957607 |
14 | 183858842 |
15 | 1361853786 |
16 | 10523285935 |
17 | 84648613474 |
18 | 707461189513 |
19 | 6132612218266 |
20 | 55050390426042 |
21 | 510994289786018 |
22 | 4898133459331104 |
23 | 48424584171850411 |
[1,1,3,9,34,139,643,3198,17186,98438,598551, 3842893,25957607,183858842,1361853786,10523285935, 84648613474,707461189513,6132612218266, 55050390426042,510994289786018,4898133459331104, 48424584171850411] |