n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 5 |
3 | 16 |
4 | 47 |
5 | 146 |
6 | 447 |
7 | 1380 |
8 | 4251 |
9 | 13102 |
10 | 40343 |
11 | 124136 |
12 | 381625 |
13 | 1172198 |
14 | 3597401 |
15 | 11031012 |
16 | 33798339 |
17 | 103477590 |
18 | 316581567 |
19 | 967900224 |
20 | 2957316429 |
21 | 9030317478 |
22 | 27558851565 |
23 | 84059345244 |
24 | 256265811333 |
25 | 780885245826 |
26 | 2378410969977 |
27 | 7241027262280 |
[1,2,5,16,47,146,447,1380,4251,13102,40343,124136, 381625,1172198,3597401,11031012,33798339, 103477590,316581567,967900224,2957316429, 9030317478,27558851565,84059345244,256265811333, 780885245826,2378410969977,7241027262280] |