n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 4 |
3 | 26 |
4 | 235 |
5 | 2727 |
6 | 38699 |
7 | 649931 |
8 | 12616132 |
9 | 278054700 |
10 | 6861571205 |
11 | 187474460527 |
12 | 5619443518165 |
13 | 183375548287557 |
14 | 6472290237774352 |
15 | 245705256222934490 |
16 | 9983967457086797107 |
17 | 432392173830077506403 |
[1,1,4,26,235,2727,38699,649931,12616132, 278054700,6861571205,187474460527,5619443518165, 183375548287557,6472290237774352, 245705256222934490,9983967457086797107, 432392173830077506403] |