n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 6 |
4 | 23 |
5 | 104 |
6 | 530 |
7 | 2958 |
8 | 17734 |
9 | 112657 |
10 | 750726 |
11 | 5207910 |
12 | 37387881 |
13 | 276467208 |
14 | 2097763554 |
15 | 16282567502 |
16 | 128951419810 |
17 | 1039752642231 |
18 | 8520041699078 |
19 | 70840843420234 |
20 | 596860116487097 |
21 | 5089815866230374 |
22 | 43886435477701502 |
23 | 382269003235832006 |
24 | 3361054683237796748 |
[1,1,2,6,23,104,530,2958,17734,112657,750726, 5207910,37387881,276467208,2097763554,16282567502, 128951419810,1039752642231,8520041699078, 70840843420234,596860116487097,5089815866230374, 43886435477701502,382269003235832006, 3361054683237796748] |