n | a(n) |
---|---|
0 | 1 |
1 | 3 |
2 | 15 |
3 | 81 |
4 | 459 |
5 | 2673 |
6 | 15849 |
7 | 95175 |
8 | 576963 |
9 | 3523257 |
10 | 21640365 |
11 | 133549155 |
12 | 827418645 |
13 | 5143397535 |
14 | 32063180535 |
15 | 200367960201 |
16 | 1254816463923 |
17 | 7873205412825 |
18 | 49482344889261 |
19 | 311457546052659 |
20 | 1963051327342449 |
21 | 12387750763156227 |
22 | 78258731003169435 |
[1,3,15,81,459,2673,15849,95175,576963,3523257, 21640365,133549155,827418645,5143397535, 32063180535,200367960201,1254816463923, 7873205412825,49482344889261,311457546052659, 1963051327342449,12387750763156227, 78258731003169435] |