n | a(n) |
---|---|
1 | 1 |
2 | 1 |
3 | 1 |
4 | 1 |
5 | 1 |
6 | 1 |
7 | 1 |
8 | 5 |
9 | 25 |
10 | 49 |
11 | 81 |
12 | 173 |
13 | 659 |
14 | 1949 |
15 | 6591 |
16 | 26979 |
17 | 151047 |
18 | 720521 |
19 | 4123761 |
20 | 21126009 |
21 | 143739573 |
[1,1,1,1,1,1,1,5,25,49,81,173,659,1949,6591,26979, 151047,720521,4123761,21126009,143739573] |