n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 6 |
3 | 19 |
4 | 66 |
5 | 243 |
6 | 930 |
7 | 3677 |
8 | 14893 |
9 | 61580 |
10 | 258798 |
11 | 1103083 |
12 | 4757383 |
13 | 20729422 |
14 | 91130929 |
15 | 403776628 |
16 | 1801448724 |
17 | 8086934285 |
18 | 36504894978 |
19 | 165610128497 |
20 | 754727631760 |
21 | 3453706751619 |
22 | 15864249216608 |
23 | 73123710278400 |
24 | 338129830741337 |
25 | 1568159784767825 |
26 | 7292647519656839 |
27 | 34000453643498153 |
[1,2,6,19,66,243,930,3677,14893,61580,258798, 1103083,4757383,20729422,91130929,403776628, 1801448724,8086934285,36504894978,165610128497, 754727631760,3453706751619,15864249216608, 73123710278400,338129830741337,1568159784767825, 7292647519656839,34000453643498153] |