n | a(n) |
---|---|
1 | 0 |
2 | 0 |
3 | 0 |
4 | 1 |
5 | 3 |
6 | 7 |
7 | 30 |
8 | 129 |
9 | 710 |
10 | 5233 |
11 | 51819 |
12 | 709352 |
13 | 13710800 |
14 | 379963761 |
15 | 15289965453 |
16 | 902291244954 |
17 | 78717614351420 |
18 | 10220774050567926 |
19 | 1986419713778008167 |
20 | 580763090016320217550 |
21 | 256553735019174430718651 |
[0,0,0,1,3,7,30,129,710,5233,51819,709352, 13710800,379963761,15289965453,902291244954, 78717614351420,10220774050567926, 1986419713778008167,580763090016320217550, 256553735019174430718651] |