n | a(n) |
---|---|
0 | 1 |
1 | 3 |
2 | 8 |
3 | 20 |
4 | 54 |
5 | 147 |
6 | 368 |
7 | 873 |
8 | 2150 |
9 | 5401 |
10 | 12948 |
11 | 29952 |
12 | 71386 |
13 | 173370 |
14 | 406720 |
15 | 928013 |
16 | 2173248 |
17 | 5178906 |
18 | 11994740 |
19 | 27138972 |
20 | 62859236 |
21 | 147973950 |
22 | 339831168 |
23 | 764579850 |
24 | 1757600988 |
25 | 4102109109 |
26 | 9364407584 |
27 | 20984799649 |
[1,3,8,20,54,147,368,873,2150,5401,12948,29952, 71386,173370,406720,928013,2173248,5178906, 11994740,27138972,62859236,147973950,339831168, 764579850,1757600988,4102109109,9364407584, 20984799649] |