n | a(n) |
---|---|
0 | 1 |
1 | 15 |
2 | 180 |
3 | 1980 |
4 | 20790 |
5 | 212058 |
6 | 2120580 |
7 | 20902860 |
8 | 203802885 |
9 | 1970094555 |
10 | 18912907728 |
11 | 180532301040 |
12 | 1715056859880 |
13 | 16227076443480 |
14 | 152998149324240 |
15 | 1438182603647856 |
16 | 13482961909198650 |
17 | 126105349621328550 |
18 | 1176983263132399800 |
19 | 10964528293391303400 |
20 | 101970113128539121620 |
[1,15,180,1980,20790,212058,2120580,20902860, 203802885,1970094555,18912907728,180532301040, 1715056859880,16227076443480,152998149324240, 1438182603647856,13482961909198650, 126105349621328550,1176983263132399800, 10964528293391303400,101970113128539121620] |