n | a(n) |
---|---|
1 | 1 |
2 | 2 |
3 | 8 |
4 | 56 |
5 | 551 |
6 | 6930 |
7 | 105937 |
8 | 1905632 |
9 | 39424240 |
10 | 922080050 |
11 | 24057287759 |
12 | 692686638072 |
13 | 21817946138353 |
14 | 746243766783074 |
15 | 27543862067299424 |
16 | 1091228270370045824 |
17 | 46187969968474139807 |
18 | 2080128468827570457762 |
19 | 99318726126650358502921 |
20 | 5011361251329169946919800 |
[1,2,8,56,551,6930,105937,1905632,39424240, 922080050,24057287759,692686638072,21817946138353, 746243766783074,27543862067299424, 1091228270370045824,46187969968474139807, 2080128468827570457762,99318726126650358502921, 5011361251329169946919800] |