n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 3 |
3 | 12 |
4 | 60 |
5 | 358 |
6 | 2471 |
7 | 19302 |
8 | 167894 |
9 | 1606137 |
10 | 16733779 |
11 | 188378402 |
12 | 2276423485 |
13 | 29367807524 |
14 | 402577243425 |
15 | 5840190914957 |
16 | 89345001017415 |
17 | 1436904211547895 |
18 | 24227076487779802 |
19 | 427187837301557598 |
20 | 7859930038606521508 |
21 | 150601795280158255827 |
[1,1,3,12,60,358,2471,19302,167894,1606137, 16733779,188378402,2276423485,29367807524, 402577243425,5840190914957,89345001017415, 1436904211547895,24227076487779802, 427187837301557598,7859930038606521508, 150601795280158255827] |