n | a(n) |
---|---|
1 | 1 |
2 | 1 |
3 | 3 |
4 | 16 |
5 | 108 |
6 | 836 |
7 | 7136 |
8 | 65708 |
9 | 643522 |
10 | 6638880 |
11 | 71649726 |
12 | 804833052 |
13 | 9373104396 |
14 | 112833093984 |
15 | 1400634016520 |
16 | 17894022203641 |
17 | 234907670711601 |
18 | 3164596264280695 |
19 | 43700481254733535 |
20 | 617995260359761384 |
21 | 8942391804824517624 |
22 | 132304132524112742604 |
[1,1,3,16,108,836,7136,65708,643522,6638880, 71649726,804833052,9373104396,112833093984, 1400634016520,17894022203641,234907670711601, 3164596264280695,43700481254733535, 617995260359761384,8942391804824517624, 132304132524112742604] |