n | a(n) |
---|---|
0 | 1 |
1 | 9 |
2 | 39 |
3 | 175 |
4 | 793 |
5 | 3611 |
6 | 16475 |
7 | 75229 |
8 | 343633 |
9 | 1569883 |
10 | 7172423 |
11 | 32769925 |
12 | 149723361 |
13 | 684077955 |
14 | 3125520983 |
15 | 14280373781 |
16 | 65246447425 |
17 | 298108406323 |
18 | 1362045450407 |
19 | 6223131628517 |
20 | 28433241805745 |
21 | 129910355608771 |
[1,9,39,175,793,3611,16475,75229,343633,1569883, 7172423,32769925,149723361,684077955,3125520983, 14280373781,65246447425,298108406323, 1362045450407,6223131628517,28433241805745, 129910355608771] |