n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 1 |
3 | 3 |
4 | 15 |
5 | 111 |
6 | 1131 |
7 | 15081 |
8 | 253473 |
9 | 5220225 |
10 | 128886921 |
11 | 3749014251 |
12 | 126648293391 |
13 | 4909623331023 |
14 | 216189866951235 |
15 | 10718939718977121 |
16 | 593865369943409601 |
17 | 36520856568972350721 |
18 | 2478236630512178688273 |
19 | 184588566642520989171795 |
20 | 15020141103053997234030351 |
[1,1,1,3,15,111,1131,15081,253473,5220225, 128886921,3749014251,126648293391,4909623331023, 216189866951235,10718939718977121, 593865369943409601,36520856568972350721, 2478236630512178688273,184588566642520989171795, 15020141103053997234030351] |