n | a(n) |
---|---|
0 | 1 |
1 | 0 |
2 | 2 |
3 | 15 |
4 | 92 |
5 | 1050 |
6 | 8514 |
7 | 147000 |
8 | 1546544 |
9 | 29673000 |
10 | 478186920 |
11 | 9011752200 |
12 | 178483287432 |
13 | 4205087686800 |
14 | 91775320005264 |
15 | 2290742704668600 |
16 | 63289842765692160 |
17 | 1696665419122968000 |
18 | 50287699532618564544 |
19 | 1549916411848463721600 |
[1,0,2,15,92,1050,8514,147000,1546544,29673000, 478186920,9011752200,178483287432,4205087686800, 91775320005264,2290742704668600,63289842765692160, 1696665419122968000,50287699532618564544, 1549916411848463721600] |