n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 4 |
3 | 18 |
4 | 124 |
5 | 1015 |
6 | 10446 |
7 | 124894 |
8 | 1734160 |
9 | 27065133 |
10 | 473544010 |
11 | 9079863496 |
12 | 190885380192 |
13 | 4332022328803 |
14 | 106201585772114 |
15 | 2781910780856250 |
16 | 77941165007299936 |
17 | 2315379935517658841 |
18 | 73009619250079314690 |
19 | 2426165226652313377828 |
20 | 85041434421474110745040 |
[1,1,4,18,124,1015,10446,124894,1734160,27065133, 473544010,9079863496,190885380192,4332022328803, 106201585772114,2781910780856250, 77941165007299936,2315379935517658841, 73009619250079314690,2426165226652313377828, 85041434421474110745040] |