n | a(n) |
---|---|
0 | 1 |
1 | 4 |
2 | 21 |
3 | 54 |
4 | 343 |
5 | 1225 |
6 | 7104 |
7 | 31777 |
8 | 169952 |
9 | 819260 |
10 | 4234749 |
11 | 21008157 |
12 | 107087889 |
13 | 536982808 |
14 | 2721665059 |
15 | 13704483996 |
16 | 69301052416 |
17 | 349520578291 |
18 | 1765820428959 |
19 | 8911657997748 |
20 | 45005845549969 |
21 | 227191526564923 |
22 | 1147192132487813 |
23 | 5791672997769659 |
[1,4,21,54,343,1225,7104,31777,169952,819260, 4234749,21008157,107087889,536982808,2721665059, 13704483996,69301052416,349520578291, 1765820428959,8911657997748,45005845549969, 227191526564923,1147192132487813,5791672997769659] |