n | a(n) |
---|---|
0 | 0 |
1 | 3 |
2 | 196 |
3 | 4418 |
4 | 43320 |
5 | 257645 |
6 | 1108828 |
7 | 3810996 |
8 | 11105328 |
9 | 28524615 |
10 | 66322740 |
11 | 142270678 |
12 | 285547496 |
13 | 541981713 |
14 | 980925260 |
15 | 1704069160 |
16 | 2856536928 |
17 | 4640618571 |
18 | 7332534948 |
19 | 11302649130 |
20 | 17039568280 |
21 | 25178606453 |
22 | 36535105596 |
23 | 52143138908 |
24 | 73300147600 |
[0,3,196,4418,43320,257645,1108828,3810996, 11105328,28524615,66322740,142270678,285547496, 541981713,980925260,1704069160,2856536928, 4640618571,7332534948,11302649130,17039568280, 25178606453,36535105596,52143138908,73300147600] |