n | a(n) |
---|---|
1 | 0 |
2 | 0 |
3 | 2 |
4 | 99 |
5 | 2102 |
6 | 19987 |
7 | 124676 |
8 | 571418 |
9 | 2122841 |
10 | 6704061 |
11 | 18711691 |
12 | 47235845 |
13 | 109938296 |
14 | 238950999 |
15 | 490309398 |
16 | 957267228 |
17 | 1790325363 |
18 | 3224010105 |
19 | 5615368229 |
20 | 9493358359 |
21 | 15627413290 |
22 | 25112609019 |
23 | 39484650296 |
24 | 60859027054 |
25 | 92114682749 |
26 | 137111560949 |
27 | 200972392655 |
[0,0,2,99,2102,19987,124676,571418,2122841, 6704061,18711691,47235845,109938296,238950999, 490309398,957267228,1790325363,3224010105, 5615368229,9493358359,15627413290,25112609019, 39484650296,60859027054,92114682749,137111560949, 200972392655] |