n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 4 |
3 | 25 |
4 | 218 |
5 | 2475 |
6 | 34696 |
7 | 579223 |
8 | 11220540 |
9 | 247395097 |
10 | 6117023600 |
11 | 167639670441 |
12 | 5044046990776 |
13 | 165322086357715 |
14 | 5863394794421088 |
15 | 223751099288794375 |
16 | 9141963589243198736 |
17 | 398198217292835137137 |
18 | 18420080017512816009280 |
19 | 901874615547758970425977 |
[1,1,4,25,218,2475,34696,579223,11220540, 247395097,6117023600,167639670441,5044046990776, 165322086357715,5863394794421088, 223751099288794375,9141963589243198736, 398198217292835137137,18420080017512816009280, 901874615547758970425977] |