n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 6 |
4 | 26 |
5 | 158 |
6 | 1330 |
7 | 15414 |
8 | 245578 |
9 | 5382862 |
10 | 162700898 |
11 | 6801417318 |
12 | 394502066810 |
13 | 31849226170622 |
14 | 3589334331706258 |
15 | 566102993389615254 |
16 | 125225331231990004138 |
17 | 38920655753545108286254 |
18 | 17021548688670112527781058 |
19 | 10486973328106497739526535366 |
[1,1,2,6,26,158,1330,15414,245578,5382862, 162700898,6801417318,394502066810,31849226170622, 3589334331706258,566102993389615254, 125225331231990004138,38920655753545108286254, 17021548688670112527781058, 10486973328106497739526535366] |