n | a(n) |
---|---|
1 | 2 |
2 | 5 |
3 | 17 |
4 | 57 |
5 | 185 |
6 | 593 |
7 | 1901 |
8 | 6121 |
9 | 19793 |
10 | 64161 |
11 | 208085 |
12 | 674105 |
13 | 2179001 |
14 | 7023409 |
15 | 22566269 |
16 | 72268809 |
17 | 230696609 |
18 | 734153537 |
19 | 2329503653 |
20 | 7371475033 |
21 | 23267249417 |
22 | 73268609745 |
23 | 230224239437 |
24 | 721965697577 |
25 | 2259855722225 |
[2,5,17,57,185,593,1901,6121,19793,64161,208085, 674105,2179001,7023409,22566269,72268809, 230696609,734153537,2329503653,7371475033, 23267249417,73268609745,230224239437,721965697577, 2259855722225] |