n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 1 |
3 | 2 |
4 | 4 |
5 | 9 |
6 | 20 |
7 | 46 |
8 | 105 |
9 | 243 |
10 | 556 |
11 | 1269 |
12 | 2873 |
13 | 6486 |
14 | 14555 |
15 | 32556 |
16 | 72517 |
17 | 161032 |
18 | 356396 |
19 | 786610 |
20 | 1731228 |
21 | 3800671 |
22 | 8323071 |
23 | 18184612 |
24 | 39640861 |
25 | 86228722 |
26 | 187177522 |
27 | 405493600 |
28 | 876728251 |
29 | 1892008416 |
30 | 4075471821 |
31 | 8762948485 |
[1,1,1,2,4,9,20,46,105,243,556,1269,2873,6486, 14555,32556,72517,161032,356396,786610,1731228, 3800671,8323071,18184612,39640861,86228722, 187177522,405493600,876728251,1892008416, 4075471821,8762948485] |