n | a(n) |
---|---|
0 | 0 |
1 | 1 |
2 | 7 |
3 | 53 |
4 | 399 |
5 | 3005 |
6 | 22631 |
7 | 170437 |
8 | 1283583 |
9 | 9666829 |
10 | 72802135 |
11 | 548282261 |
12 | 4129184367 |
13 | 31097419613 |
14 | 234198674759 |
15 | 1763780401765 |
16 | 13283257511391 |
17 | 100037924186797 |
18 | 753398499353143 |
19 | 5673941192219189 |
20 | 42731182342946895 |
[0,1,7,53,399,3005,22631,170437,1283583,9666829, 72802135,548282261,4129184367,31097419613, 234198674759,1763780401765,13283257511391, 100037924186797,753398499353143,5673941192219189, 42731182342946895] |