n | a(n) |
---|---|
1 | 4 |
2 | 21 |
3 | 143 |
4 | 1063 |
5 | 8371 |
6 | 68785 |
7 | 583436 |
8 | 5069633 |
9 | 44876757 |
10 | 403025174 |
11 | 3660702622 |
12 | 33550877248 |
13 | 309726969451 |
14 | 2876065468123 |
15 | 26835315229835 |
16 | 251389798269317 |
17 | 2362887262236150 |
18 | 22272676889496853 |
19 | 210455460654786509 |
20 | 1992806263723883464 |
[4,21,143,1063,8371,68785,583436,5069633,44876757, 403025174,3660702622,33550877248,309726969451, 2876065468123,26835315229835,251389798269317, 2362887262236150,22272676889496853, 210455460654786509,1992806263723883464] |