n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 11 |
3 | 64 |
4 | 373 |
5 | 2174 |
6 | 12671 |
7 | 73852 |
8 | 430441 |
9 | 2508794 |
10 | 14622323 |
11 | 85225144 |
12 | 496728541 |
13 | 2895146102 |
14 | 16874148071 |
15 | 98349742324 |
16 | 573224305873 |
17 | 3340996092914 |
18 | 19472752251611 |
19 | 113495517416752 |
20 | 661500352248901 |
[1,2,11,64,373,2174,12671,73852,430441,2508794, 14622323,85225144,496728541,2895146102, 16874148071,98349742324,573224305873, 3340996092914,19472752251611,113495517416752, 661500352248901] |