n | a(n) |
---|---|
1 | 3 |
2 | 15 |
3 | 291 |
4 | 723 |
5 | 1455 |
6 | 3615 |
7 | 8835 |
8 | 130827 |
9 | 239595 |
10 | 273435 |
11 | 426891 |
12 | 654135 |
13 | 2762427 |
14 | 2820927 |
15 | 8098527 |
16 | 16766835 |
17 | 43558023 |
18 | 55566015 |
[3,15,291,723,1455,3615,8835,130827,239595,273435, 426891,654135,2762427,2820927,8098527,16766835, 43558023,55566015] |