n | a(n) |
---|---|
1 | 1 |
2 | 3 |
3 | 7 |
4 | 19 |
5 | 51 |
6 | 159 |
7 | 519 |
8 | 1867 |
9 | 7234 |
10 | 30243 |
11 | 135125 |
12 | 642307 |
13 | 3231047 |
14 | 17138845 |
15 | 95554662 |
16 | 558384955 |
17 | 3411049542 |
18 | 21730279218 |
19 | 144048688538 |
20 | 991665854999 |
21 | 7077433997172 |
22 | 52283785492733 |
23 | 399238054300828 |
24 | 3147127294177099 |
25 | 25579801627862301 |
26 | 214139186144996635 |
[1,3,7,19,51,159,519,1867,7234,30243,135125, 642307,3231047,17138845,95554662,558384955, 3411049542,21730279218,144048688538,991665854999, 7077433997172,52283785492733,399238054300828, 3147127294177099,25579801627862301, 214139186144996635] |