n | a(n) |
---|---|
1 | 1 |
2 | 4 |
3 | 16 |
4 | 97 |
5 | 840 |
6 | 9751 |
7 | 141364 |
8 | 2448224 |
9 | 49213158 |
10 | 1125229242 |
11 | 28823071636 |
12 | 817379051371 |
13 | 25417591832210 |
14 | 859893812841432 |
15 | 31439503159778411 |
16 | 1235301513693182001 |
17 | 51906185332750116476 |
18 | 2322562816174820224108 |
19 | 110253678955674860565875 |
[1,4,16,97,840,9751,141364,2448224,49213158, 1125229242,28823071636,817379051371, 25417591832210,859893812841432,31439503159778411, 1235301513693182001,51906185332750116476, 2322562816174820224108,110253678955674860565875] |