n | a(n) |
---|---|
1 | 1 |
2 | 2 |
3 | 6 |
4 | 26 |
5 | 134 |
6 | 809 |
7 | 5669 |
8 | 45353 |
9 | 408184 |
10 | 4081844 |
11 | 44900294 |
12 | 538803530 |
13 | 7004445892 |
14 | 98062242500 |
15 | 1470933637503 |
16 | 23534938200055 |
17 | 400093949400940 |
18 | 7201691089216926 |
19 | 136832130695121608 |
20 | 2736642613902432167 |
[1,2,6,26,134,809,5669,45353,408184,4081844, 44900294,538803530,7004445892,98062242500, 1470933637503,23534938200055,400093949400940, 7201691089216926,136832130695121608, 2736642613902432167] |