n | a(n) |
---|---|
1 | 0 |
2 | 0 |
3 | 0 |
4 | 384 |
5 | 19100 |
6 | 557808 |
7 | 5841780 |
8 | 41338400 |
9 | 209264796 |
10 | 859752800 |
11 | 2982181004 |
12 | 9131392296 |
13 | 25196132260 |
14 | 63968987264 |
15 | 151223202900 |
16 | 336724832384 |
17 | 711538908572 |
18 | 1437022315440 |
19 | 2787781494732 |
20 | 5219454908200 |
21 | 9464698212228 |
[0,0,0,384,19100,557808,5841780,41338400, 209264796,859752800,2982181004,9131392296, 25196132260,63968987264,151223202900,336724832384, 711538908572,1437022315440,2787781494732, 5219454908200,9464698212228] |