n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 9 |
3 | 54 |
4 | 375 |
5 | 2848 |
6 | 22981 |
7 | 193742 |
8 | 1688427 |
9 | 15101778 |
10 | 137930199 |
11 | 1281629088 |
12 | 12081441411 |
13 | 115288530516 |
14 | 1111783691037 |
15 | 10819906562622 |
16 | 106147110898419 |
17 | 1048748721598078 |
18 | 10427413491373843 |
19 | 104265186535823798 |
20 | 1047894080773661481 |
[1,2,9,54,375,2848,22981,193742,1688427,15101778, 137930199,1281629088,12081441411,115288530516, 1111783691037,10819906562622,106147110898419, 1048748721598078,10427413491373843, 104265186535823798,1047894080773661481] |