n | a(n) |
---|---|
0 | 1 |
1 | 3 |
2 | 9 |
3 | 30 |
4 | 90 |
5 | 269 |
6 | 788 |
7 | 2249 |
8 | 6340 |
9 | 17526 |
10 | 47911 |
11 | 129639 |
12 | 348251 |
13 | 929714 |
14 | 2469499 |
15 | 6532869 |
16 | 17219031 |
17 | 45246630 |
18 | 118572805 |
19 | 309998131 |
20 | 808746993 |
21 | 2105893899 |
22 | 5474080107 |
23 | 14207001052 |
24 | 36818679828 |
25 | 95292132897 |
26 | 246327403310 |
[1,3,9,30,90,269,788,2249,6340,17526,47911,129639, 348251,929714,2469499,6532869,17219031,45246630, 118572805,309998131,808746993,2105893899, 5474080107,14207001052,36818679828,95292132897, 246327403310] |