n | a(n) |
---|---|
1 | 1 |
2 | 1 |
3 | 2 |
4 | 6 |
5 | 31 |
6 | 255 |
7 | 2788 |
8 | 37333 |
9 | 578799 |
10 | 10134071 |
11 | 197394232 |
12 | 4231417728 |
13 | 98991987830 |
14 | 2510081238264 |
15 | 68583045013542 |
16 | 2009094843480565 |
17 | 62824038815664719 |
18 | 2088829704241946181 |
19 | 73591470349452760456 |
20 | 2738742863175749456078 |
[1,1,2,6,31,255,2788,37333,578799,10134071, 197394232,4231417728,98991987830,2510081238264, 68583045013542,2009094843480565,62824038815664719, 2088829704241946181,73591470349452760456, 2738742863175749456078] |