n | a(n) |
---|---|
0 | 1 |
1 | 0 |
2 | 3 |
3 | 6 |
4 | 49 |
5 | 300 |
6 | 2491 |
7 | 22890 |
8 | 239457 |
9 | 2782584 |
10 | 35595091 |
11 | 496577070 |
12 | 7499663953 |
13 | 121855323876 |
14 | 2118793593099 |
15 | 39245026343250 |
16 | 771255810671041 |
17 | 16025261292247920 |
18 | 350956070419872547 |
19 | 8078570913162379734 |
20 | 194969375055353840241 |
21 | 4922311437793379501340 |
[1,0,3,6,49,300,2491,22890,239457,2782584, 35595091,496577070,7499663953,121855323876, 2118793593099,39245026343250,771255810671041, 16025261292247920,350956070419872547, 8078570913162379734,194969375055353840241, 4922311437793379501340] |