n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 4 |
3 | 11 |
4 | 33 |
5 | 100 |
6 | 305 |
7 | 937 |
8 | 2890 |
9 | 8943 |
10 | 27741 |
11 | 86216 |
12 | 268355 |
13 | 836297 |
14 | 2608818 |
15 | 8144875 |
16 | 25446229 |
17 | 79545148 |
18 | 248780979 |
19 | 778400001 |
20 | 2436380402 |
21 | 7628211951 |
22 | 23890103153 |
23 | 74836927720 |
24 | 234478937321 |
25 | 734802907841 |
26 | 2303073316042 |
[1,1,4,11,33,100,305,937,2890,8943,27741,86216, 268355,836297,2608818,8144875,25446229,79545148, 248780979,778400001,2436380402,7628211951, 23890103153,74836927720,234478937321,734802907841, 2303073316042] |