n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 7 |
3 | 19 |
4 | 109 |
5 | 421 |
6 | 2251 |
7 | 10207 |
8 | 53593 |
9 | 263305 |
10 | 1385263 |
11 | 7109323 |
12 | 37728901 |
13 | 198723565 |
14 | 1065245299 |
15 | 5706564247 |
16 | 30879236017 |
17 | 167409942289 |
18 | 913397457367 |
19 | 4996676997379 |
20 | 27455383898269 |
21 | 151263170713909 |
22 | 836158046041243 |
[1,1,7,19,109,421,2251,10207,53593,263305,1385263, 7109323,37728901,198723565,1065245299,5706564247, 30879236017,167409942289,913397457367, 4996676997379,27455383898269,151263170713909, 836158046041243] |