n | a(n) |
---|---|
1 | 0 |
2 | 0 |
3 | 1 |
4 | 2 |
5 | 6 |
6 | 12 |
7 | 30 |
8 | 66 |
9 | 156 |
10 | 357 |
11 | 842 |
12 | 1961 |
13 | 4643 |
14 | 10960 |
15 | 26072 |
16 | 62084 |
17 | 148499 |
18 | 355784 |
19 | 855038 |
20 | 2058536 |
21 | 4967099 |
22 | 12005308 |
23 | 29067646 |
24 | 70483478 |
25 | 171158311 |
26 | 416168250 |
27 | 1013156687 |
28 | 2469301316 |
29 | 6024696764 |
30 | 14713845227 |
31 | 35968547836 |
32 | 88003373522 |
33 | 215493542625 |
[0,0,1,2,6,12,30,66,156,357,842,1961,4643,10960, 26072,62084,148499,355784,855038,2058536,4967099, 12005308,29067646,70483478,171158311,416168250, 1013156687,2469301316,6024696764,14713845227, 35968547836,88003373522,215493542625] |