n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 3 |
3 | 9 |
4 | 39 |
5 | 143 |
6 | 645 |
7 | 2603 |
8 | 12089 |
9 | 51843 |
10 | 244625 |
11 | 1085225 |
12 | 5172639 |
13 | 23504709 |
14 | 112876019 |
15 | 521562001 |
16 | 2517993407 |
17 | 11779732141 |
18 | 57108894755 |
19 | 269728321329 |
20 | 1311947665271 |
21 | 6242539439513 |
22 | 30444460089423 |
23 | 145731077374047 |
24 | 712289602626021 |
25 | 3426187222066247 |
26 | 16777120269058485 |
27 | 81025572922970219 |
[1,1,3,9,39,143,645,2603,12089,51843,244625, 1085225,5172639,23504709,112876019,521562001, 2517993407,11779732141,57108894755,269728321329, 1311947665271,6242539439513,30444460089423, 145731077374047,712289602626021,3426187222066247, 16777120269058485,81025572922970219] |