n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 3 |
3 | 12 |
4 | 58 |
5 | 325 |
6 | 2060 |
7 | 14514 |
8 | 112170 |
9 | 941128 |
10 | 8502393 |
11 | 82160481 |
12 | 844532873 |
13 | 9191329357 |
14 | 105491177081 |
15 | 1272418794619 |
16 | 16080824798705 |
17 | 212370154398094 |
18 | 2923859710010527 |
19 | 41877072960374478 |
20 | 622763691600244335 |
[1,1,3,12,58,325,2060,14514,112170,941128,8502393, 82160481,844532873,9191329357,105491177081, 1272418794619,16080824798705,212370154398094, 2923859710010527,41877072960374478, 622763691600244335] |