n | a(n) |
---|---|
1 | 6 |
2 | 21 |
3 | 56 |
4 | 231 |
5 | 888 |
6 | 4291 |
7 | 20646 |
8 | 107331 |
9 | 563786 |
10 | 3037314 |
11 | 16514106 |
12 | 90782986 |
13 | 502474356 |
14 | 2799220041 |
15 | 15673673176 |
16 | 88162676511 |
17 | 497847963696 |
18 | 2821127825971 |
19 | 16035812864946 |
20 | 91404068329560 |
[6,21,56,231,888,4291,20646,107331,563786,3037314, 16514106,90782986,502474356,2799220041, 15673673176,88162676511,497847963696, 2821127825971,16035812864946,91404068329560] |