n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 13 |
3 | 25 |
4 | 181 |
5 | 481 |
6 | 2653 |
7 | 8425 |
8 | 40261 |
9 | 141361 |
10 | 624493 |
11 | 2320825 |
12 | 9814741 |
13 | 37664641 |
14 | 155441533 |
15 | 607417225 |
16 | 2472715621 |
17 | 9761722321 |
18 | 39434309773 |
19 | 156574977625 |
20 | 629786694901 |
21 | 2508686426401 |
22 | 10066126765213 |
23 | 40170363882025 |
[1,1,13,25,181,481,2653,8425,40261,141361,624493, 2320825,9814741,37664641,155441533,607417225, 2472715621,9761722321,39434309773,156574977625, 629786694901,2508686426401,10066126765213, 40170363882025] |