n | a(n) |
---|---|
1 | 1 |
2 | 3 |
3 | 9 |
4 | 105 |
5 | 306 |
6 | 3567 |
7 | 10395 |
8 | 121173 |
9 | 353124 |
10 | 4116315 |
11 | 11995821 |
12 | 139833537 |
13 | 407504790 |
14 | 4750223943 |
15 | 13843167039 |
16 | 161367780525 |
17 | 470260174536 |
18 | 5481754313907 |
19 | 15975002767185 |
20 | 186218278892313 |
21 | 542679833909754 |
[1,3,9,105,306,3567,10395,121173,353124,4116315, 11995821,139833537,407504790,4750223943, 13843167039,161367780525,470260174536, 5481754313907,15975002767185,186218278892313, 542679833909754] |