n | a(n) |
---|---|
1 | 3 |
2 | 6 |
3 | 15 |
4 | 45 |
5 | 69 |
6 | 381 |
7 | 387 |
8 | 1890 |
9 | 3393 |
10 | 14907 |
11 | 17799 |
12 | 139518 |
13 | 133101 |
14 | 798129 |
15 | 1804431 |
16 | 5452434 |
17 | 8072529 |
18 | 64596051 |
19 | 64573623 |
20 | 437717394 |
21 | 872156889 |
22 | 3138141621 |
23 | 4279259571 |
24 | 35361942282 |
25 | 42364514331 |
[3,6,15,45,69,381,387,1890,3393,14907,17799, 139518,133101,798129,1804431,5452434,8072529, 64596051,64573623,437717394,872156889,3138141621, 4279259571,35361942282,42364514331] |