n | a(n) |
---|---|
1 | 1 |
2 | 4 |
3 | 26 |
4 | 234 |
5 | 2696 |
6 | 37919 |
7 | 630521 |
8 | 12111114 |
9 | 264051201 |
10 | 6445170229 |
11 | 174183891471 |
12 | 5164718385337 |
13 | 166737090160871 |
14 | 5822980248613990 |
15 | 218756388226681557 |
16 | 8797723991458469015 |
17 | 377159237609540937788 |
18 | 17170729962232112834302 |
19 | 827382365085791968518198 |
20 | 42070004707327023844695198 |
[1,4,26,234,2696,37919,630521,12111114,264051201, 6445170229,174183891471,5164718385337, 166737090160871,5822980248613990, 218756388226681557,8797723991458469015, 377159237609540937788,17170729962232112834302, 827382365085791968518198, 42070004707327023844695198] |