n | a(n) |
---|---|
0 | 0 |
1 | 1 |
2 | 1 |
3 | 25 |
4 | 73 |
5 | 673 |
6 | 3025 |
7 | 20329 |
8 | 107929 |
9 | 653425 |
10 | 3674017 |
11 | 21516217 |
12 | 123214825 |
13 | 714258241 |
14 | 4113149041 |
15 | 23770767625 |
16 | 137113121593 |
17 | 791700344593 |
18 | 4568824885825 |
19 | 26373938451289 |
20 | 152222238686089 |
21 | 878652055801825 |
[0,1,1,25,73,673,3025,20329,107929,653425,3674017, 21516217,123214825,714258241,4113149041, 23770767625,137113121593,791700344593, 4568824885825,26373938451289,152222238686089, 878652055801825] |