n | a(n) |
---|---|
1 | 3 |
2 | 15 |
3 | 55 |
4 | 253 |
5 | 1081 |
6 | 13861 |
7 | 115921 |
8 | 665281 |
9 | 18280081 |
10 | 75479041 |
11 | 2080995841 |
12 | 68302634401 |
13 | 924972048001 |
14 | 48318396825601 |
15 | 495843855091201 |
16 | 31747936252032001 |
17 | 791764338474869761 |
[3,15,55,253,1081,13861,115921,665281,18280081, 75479041,2080995841,68302634401,924972048001, 48318396825601,495843855091201,31747936252032001, 791764338474869761] |