n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 1 |
3 | 9 |
4 | 25 |
5 | 81 |
6 | 273 |
7 | 889 |
8 | 2921 |
9 | 9601 |
10 | 31521 |
11 | 103529 |
12 | 340025 |
13 | 1116721 |
14 | 3667633 |
15 | 12045529 |
16 | 39560841 |
17 | 129928801 |
18 | 426722241 |
19 | 1401474249 |
20 | 4602830425 |
21 | 15116972561 |
22 | 49648333393 |
23 | 163058906169 |
24 | 535530702761 |
25 | 1758831457601 |
26 | 5776490648161 |
27 | 18971598480169 |
28 | 62307994735225 |
[1,1,1,9,25,81,273,889,2921,9601,31521,103529, 340025,1116721,3667633,12045529,39560841, 129928801,426722241,1401474249,4602830425, 15116972561,49648333393,163058906169,535530702761, 1758831457601,5776490648161,18971598480169, 62307994735225] |