n | a(n) |
---|---|
1 | 1 |
2 | 4 |
3 | 19 |
4 | 129 |
5 | 1018 |
6 | 9912 |
7 | 111074 |
8 | 1416398 |
9 | 20295208 |
10 | 323437728 |
11 | 5657339928 |
12 | 107765338920 |
13 | 2223272444976 |
14 | 49399021063584 |
15 | 1175549092374672 |
16 | 29822113966614768 |
17 | 803485297880792064 |
18 | 22917198585269729664 |
19 | 689927737384840662144 |
20 | 21861972842959846530432 |
[1,4,19,129,1018,9912,111074,1416398,20295208, 323437728,5657339928,107765338920,2223272444976, 49399021063584,1175549092374672,29822113966614768, 803485297880792064,22917198585269729664, 689927737384840662144,21861972842959846530432] |