n | a(n) |
---|---|
1 | 1 |
2 | 4 |
3 | 16 |
4 | 111 |
5 | 999 |
6 | 12513 |
7 | 185683 |
8 | 3316418 |
9 | 67810767 |
10 | 1576561677 |
11 | 40862702931 |
12 | 1171104916405 |
13 | 36722498575799 |
14 | 1251419967587955 |
15 | 46034784688102781 |
16 | 1818440444592581068 |
17 | 76763036794222996512 |
18 | 3448830049286378614987 |
19 | 164309958491233496689189 |
[1,4,16,111,999,12513,185683,3316418,67810767, 1576561677,40862702931,1171104916405, 36722498575799,1251419967587955,46034784688102781, 1818440444592581068,76763036794222996512, 3448830049286378614987,164309958491233496689189] |