n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 9 |
3 | 34 |
4 | 161 |
5 | 690 |
6 | 3340 |
7 | 15127 |
8 | 74025 |
9 | 345350 |
10 | 1700641 |
11 | 8078534 |
12 | 39940239 |
13 | 191998427 |
14 | 951780628 |
15 | 4613430423 |
16 | 22912945993 |
17 | 111732959607 |
18 | 555692292248 |
19 | 2722027662579 |
20 | 13551646056826 |
21 | 66612271878273 |
22 | 331891009874753 |
23 | 1635825684723348 |
24 | 8155387103254651 |
25 | 40283455920402930 |
26 | 200930087609072285 |
[1,2,9,34,161,690,3340,15127,74025,345350,1700641, 8078534,39940239,191998427,951780628,4613430423, 22912945993,111732959607,555692292248, 2722027662579,13551646056826,66612271878273, 331891009874753,1635825684723348,8155387103254651, 40283455920402930,200930087609072285] |