n | a(n) |
---|---|
0 | 1 |
1 | 20 |
2 | 200 |
3 | 1340 |
4 | 6800 |
5 | 28004 |
6 | 97880 |
7 | 299660 |
8 | 822560 |
9 | 2060980 |
10 | 4780008 |
11 | 10377180 |
12 | 21278640 |
13 | 41517060 |
14 | 77548920 |
15 | 139380012 |
16 | 242080320 |
17 | 407782740 |
18 | 668274440 |
19 | 1068305020 |
20 | 1669752016 |
21 | 2556801700 |
22 | 3842321560 |
23 | 5675620300 |
[1,20,200,1340,6800,28004,97880,299660,822560, 2060980,4780008,10377180,21278640,41517060, 77548920,139380012,242080320,407782740,668274440, 1068305020,1669752016,2556801700,3842321560, 5675620300] |