n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 3 |
3 | 9 |
4 | 35 |
5 | 145 |
6 | 659 |
7 | 3137 |
8 | 15619 |
9 | 80177 |
10 | 422595 |
11 | 2273633 |
12 | 12447667 |
13 | 69138193 |
14 | 388784259 |
15 | 2209440945 |
16 | 12671782579 |
17 | 73260414481 |
18 | 426545078627 |
19 | 2499059841249 |
20 | 14723542302627 |
21 | 87181150961361 |
22 | 518554078448339 |
23 | 3097007445391441 |
24 | 18565515801339827 |
[1,1,3,9,35,145,659,3137,15619,80177,422595, 2273633,12447667,69138193,388784259,2209440945, 12671782579,73260414481,426545078627, 2499059841249,14723542302627,87181150961361, 518554078448339,3097007445391441, 18565515801339827] |