n | a(n) |
---|---|
0 | 1 |
1 | 0 |
2 | 2 |
3 | 1 |
4 | 5 |
5 | 5 |
6 | 15 |
7 | 20 |
8 | 50 |
9 | 76 |
10 | 176 |
11 | 286 |
12 | 638 |
13 | 1078 |
14 | 2354 |
15 | 4081 |
16 | 8789 |
17 | 15521 |
18 | 33099 |
19 | 59279 |
20 | 125477 |
21 | 227239 |
22 | 478193 |
23 | 873885 |
24 | 1830271 |
25 | 3370029 |
26 | 7030571 |
27 | 13027729 |
28 | 27088871 |
29 | 50469889 |
30 | 104647631 |
31 | 195892564 |
32 | 405187826 |
33 | 761615284 |
34 | 1571990936 |
[1,0,2,1,5,5,15,20,50,76,176,286,638,1078,2354, 4081,8789,15521,33099,59279,125477,227239,478193, 873885,1830271,3370029,7030571,13027729,27088871, 50469889,104647631,195892564,405187826,761615284, 1571990936] |