n | a(n) |
---|---|
0 | 1 |
1 | 21 |
2 | 196 |
3 | 1176 |
4 | 5292 |
5 | 19404 |
6 | 60984 |
7 | 169884 |
8 | 429429 |
9 | 1002001 |
10 | 2186184 |
11 | 4504864 |
12 | 8836464 |
13 | 16604784 |
14 | 30046752 |
15 | 52581816 |
16 | 89311761 |
17 | 147685461 |
18 | 238369516 |
19 | 376372920 |
20 | 582481900 |
21 | 885069900 |
22 | 1322357400 |
23 | 1945206900 |
24 | 2820550005 |
25 | 4035556161 |
26 | 5702666256 |
27 | 7965629056 |
[1,21,196,1176,5292,19404,60984,169884,429429, 1002001,2186184,4504864,8836464,16604784,30046752, 52581816,89311761,147685461,238369516,376372920, 582481900,885069900,1322357400,1945206900, 2820550005,4035556161,5702666256,7965629056] |