n | a(n) |
---|---|
1 | 0 |
2 | 1 |
3 | 2 |
4 | 6 |
5 | 12 |
6 | 30 |
7 | 66 |
8 | 161 |
9 | 376 |
10 | 954 |
11 | 2350 |
12 | 6061 |
13 | 15612 |
14 | 41067 |
15 | 108374 |
16 | 289800 |
17 | 778064 |
18 | 2105739 |
19 | 5723190 |
20 | 15638235 |
21 | 42890100 |
22 | 118098876 |
23 | 326217628 |
24 | 903897631 |
25 | 2511285360 |
26 | 6994836250 |
27 | 19527701960 |
28 | 54632961864 |
29 | 153147864380 |
30 | 430095282258 |
31 | 1209924870900 |
[0,1,2,6,12,30,66,161,376,954,2350,6061,15612, 41067,108374,289800,778064,2105739,5723190, 15638235,42890100,118098876,326217628,903897631, 2511285360,6994836250,19527701960,54632961864, 153147864380,430095282258,1209924870900] |