n | a(n) |
---|---|
1 | -1 |
2 | -1 |
3 | 1 |
4 | 37 |
5 | 617 |
6 | 10331 |
7 | 205657 |
8 | 4417993 |
9 | 111313529 |
10 | 3451185211 |
11 | 113456434771 |
12 | 4398448576657 |
13 | 187757129777747 |
14 | 8377806843970331 |
15 | 406839682998275587 |
16 | 22177392981497097521 |
17 | 1341055344385518798469 |
18 | 83727136357670859345679 |
19 | 5727006517323354547143763 |
[-1,-1,1,37,617,10331,205657,4417993,111313529, 3451185211,113456434771,4398448576657, 187757129777747,8377806843970331, 406839682998275587,22177392981497097521, 1341055344385518798469,83727136357670859345679, 5727006517323354547143763] |