n | a(n) |
---|---|
0 | 1 |
1 | 3 |
2 | 9 |
3 | 28 |
4 | 87 |
5 | 270 |
6 | 838 |
7 | 2601 |
8 | 8073 |
9 | 25057 |
10 | 77772 |
11 | 241389 |
12 | 749224 |
13 | 2325444 |
14 | 7217721 |
15 | 22402387 |
16 | 69532605 |
17 | 215815536 |
18 | 669848995 |
19 | 2079079590 |
20 | 6453054306 |
21 | 20029011913 |
22 | 62166115329 |
23 | 192951400293 |
24 | 598883212792 |
25 | 1858815753705 |
26 | 5769398661408 |
27 | 17907079197016 |
[1,3,9,28,87,270,838,2601,8073,25057,77772,241389, 749224,2325444,7217721,22402387,69532605, 215815536,669848995,2079079590,6453054306, 20029011913,62166115329,192951400293,598883212792, 1858815753705,5769398661408,17907079197016] |