n | a(n) |
---|---|
0 | 1 |
1 | 4 |
2 | 13 |
3 | 40 |
4 | 157 |
5 | 400 |
6 | 1813 |
7 | 4000 |
8 | 20317 |
9 | 40000 |
10 | 222853 |
11 | 400000 |
12 | 2405677 |
13 | 4000000 |
14 | 25651093 |
15 | 40000000 |
16 | 270859837 |
17 | 400000000 |
18 | 2837738533 |
19 | 4000000000 |
20 | 29539646797 |
21 | 40000000000 |
22 | 305856821173 |
23 | 400000000000 |
24 | 3152711390557 |
[1,4,13,40,157,400,1813,4000,20317,40000,222853, 400000,2405677,4000000,25651093,40000000, 270859837,400000000,2837738533,4000000000, 29539646797,40000000000,305856821173,400000000000, 3152711390557] |