n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 4 |
3 | 31 |
4 | 351 |
5 | 5144 |
6 | 91816 |
7 | 1918578 |
8 | 45687682 |
9 | 1216354021 |
10 | 35689352250 |
11 | 1141323078031 |
12 | 39429988969021 |
13 | 1461049507764175 |
14 | 57720478019188989 |
15 | 2419008380691088543 |
16 | 107083662651332423339 |
17 | 4988596265684542112304 |
18 | 243781041304397011647766 |
[1,1,4,31,351,5144,91816,1918578,45687682, 1216354021,35689352250,1141323078031, 39429988969021,1461049507764175,57720478019188989, 2419008380691088543,107083662651332423339, 4988596265684542112304,243781041304397011647766] |