n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 5 |
4 | 17 |
5 | 81 |
6 | 468 |
7 | 3197 |
8 | 25043 |
9 | 221209 |
10 | 2175217 |
11 | 23564851 |
12 | 278850731 |
13 | 3578584369 |
14 | 49503750433 |
15 | 734305631413 |
16 | 11626505830702 |
17 | 195712848150141 |
18 | 3490212458677515 |
19 | 65732334638426517 |
20 | 1303691303662125906 |
[1,1,2,5,17,81,468,3197,25043,221209,2175217, 23564851,278850731,3578584369,49503750433, 734305631413,11626505830702,195712848150141, 3490212458677515,65732334638426517, 1303691303662125906] |