n | a(n) |
---|---|
0 | 0 |
1 | 0 |
2 | 0 |
3 | 3 |
4 | 15 |
5 | 86 |
6 | 544 |
7 | 3934 |
8 | 32079 |
9 | 292509 |
10 | 2952702 |
11 | 32712087 |
12 | 394749367 |
13 | 5155010088 |
14 | 72440184064 |
15 | 1090017765544 |
16 | 17486996858151 |
17 | 297965879586295 |
18 | 5374189975316350 |
19 | 102290550351854445 |
20 | 2049025241258716927 |
21 | 43089888746430771294 |
22 | 949172134240270646352 |
[0,0,0,3,15,86,544,3934,32079,292509,2952702, 32712087,394749367,5155010088,72440184064, 1090017765544,17486996858151,297965879586295, 5374189975316350,102290550351854445, 2049025241258716927,43089888746430771294, 949172134240270646352] |