n | a(n) |
---|---|
0 | 0 |
1 | 0 |
2 | 2 |
3 | 18 |
4 | 162 |
5 | 1500 |
6 | 14240 |
7 | 137886 |
8 | 1356194 |
9 | 13507416 |
10 | 135916002 |
11 | 1379301990 |
12 | 14097919968 |
13 | 144977296932 |
14 | 1498750896708 |
15 | 15564971674518 |
16 | 162298598439330 |
17 | 1698353774374704 |
18 | 17828728267167326 |
19 | 187693442844729174 |
20 | 1981038544180652162 |
21 | 20957881615473229620 |
[0,0,2,18,162,1500,14240,137886,1356194,13507416, 135916002,1379301990,14097919968,144977296932, 1498750896708,15564971674518,162298598439330, 1698353774374704,17828728267167326, 187693442844729174,1981038544180652162, 20957881615473229620] |