n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 1 |
3 | 2 |
4 | 6 |
5 | 27 |
6 | 163 |
7 | 1271 |
8 | 12354 |
9 | 145801 |
10 | 2047083 |
11 | 33642256 |
12 | 638588460 |
13 | 13845027215 |
14 | 339607971556 |
15 | 9347964267192 |
16 | 286688210033698 |
17 | 9734737020358855 |
18 | 363942977852123850 |
19 | 14906164891970353970 |
20 | 665835978084064725837 |
21 | 32304867226779146102085 |
22 | 1696127595521806495181023 |
[1,1,1,2,6,27,163,1271,12354,145801,2047083, 33642256,638588460,13845027215,339607971556, 9347964267192,286688210033698,9734737020358855, 363942977852123850,14906164891970353970, 665835978084064725837,32304867226779146102085, 1696127595521806495181023] |