n | a(n) |
---|---|
1 | 2 |
2 | 4 |
3 | 12 |
4 | 49 |
5 | 245 |
6 | 1470 |
7 | 10295 |
8 | 82362 |
9 | 741264 |
10 | 7412647 |
11 | 81539127 |
12 | 978469535 |
13 | 12720103955 |
14 | 178081455373 |
15 | 2671221830606 |
16 | 42739549289708 |
17 | 726572337925041 |
18 | 13078302082650740 |
19 | 248487739570364075 |
20 | 4969754791407281515 |
[2,4,12,49,245,1470,10295,82362,741264,7412647, 81539127,978469535,12720103955,178081455373, 2671221830606,42739549289708,726572337925041, 13078302082650740,248487739570364075, 4969754791407281515] |