n | a(n) |
---|---|
1 | 1 |
2 | 2 |
3 | 6 |
4 | 28 |
5 | 174 |
6 | 1308 |
7 | 11300 |
8 | 108808 |
9 | 1145078 |
10 | 12996332 |
11 | 157580252 |
12 | 2026874424 |
13 | 27507762028 |
14 | 392226116696 |
15 | 5855551243464 |
16 | 91263899531280 |
17 | 1481385005886374 |
18 | 24989341719984972 |
19 | 437270678940944556 |
20 | 7923785627972483672 |
[1,2,6,28,174,1308,11300,108808,1145078,12996332, 157580252,2026874424,27507762028,392226116696, 5855551243464,91263899531280,1481385005886374, 24989341719984972,437270678940944556, 7923785627972483672] |