n | a(n) |
---|---|
0 | 1 |
1 | 3 |
2 | 9 |
3 | 33 |
4 | 145 |
5 | 713 |
6 | 3745 |
7 | 20513 |
8 | 115713 |
9 | 667329 |
10 | 3916033 |
11 | 23305857 |
12 | 140327681 |
13 | 853262465 |
14 | 5231925761 |
15 | 32313686529 |
16 | 200843829249 |
17 | 1255308123137 |
18 | 7884792852481 |
19 | 49745076576257 |
20 | 315091155558401 |
21 | 2003009460686849 |
22 | 12774610185633793 |
[1,3,9,33,145,713,3745,20513,115713,667329, 3916033,23305857,140327681,853262465,5231925761, 32313686529,200843829249,1255308123137, 7884792852481,49745076576257,315091155558401, 2003009460686849,12774610185633793] |