n | a(n) |
---|---|
0 | 1 |
1 | 9 |
2 | 25 |
3 | 113 |
4 | 401 |
5 | 1593 |
6 | 5993 |
7 | 23137 |
8 | 88225 |
9 | 338409 |
10 | 1294393 |
11 | 4957649 |
12 | 18976049 |
13 | 72655641 |
14 | 278143625 |
15 | 1064876737 |
16 | 4076758849 |
17 | 15607654857 |
18 | 59752621657 |
19 | 228758827313 |
20 | 875786006225 |
21 | 3352883803641 |
22 | 12836269650857 |
23 | 49142725927201 |
[1,9,25,113,401,1593,5993,23137,88225,338409, 1294393,4957649,18976049,72655641,278143625, 1064876737,4076758849,15607654857,59752621657, 228758827313,875786006225,3352883803641, 12836269650857,49142725927201] |