n | a(n) |
---|---|
1 | 1 |
2 | 1 |
3 | 4 |
4 | 23 |
5 | 209 |
6 | 2301 |
7 | 29992 |
8 | 450525 |
9 | 7666097 |
10 | 145748085 |
11 | 3062086652 |
12 | 70451319403 |
13 | 1761725152737 |
14 | 47575849111097 |
15 | 1379912569740752 |
16 | 42782608276446713 |
17 | 1411969570132526241 |
18 | 49423093937535984041 |
[1,1,4,23,209,2301,29992,450525,7666097,145748085, 3062086652,70451319403,1761725152737, 47575849111097,1379912569740752,42782608276446713, 1411969570132526241,49423093937535984041] |