n | a(n) |
---|---|
0 | 1 |
1 | 20 |
2 | 94 |
3 | 450 |
4 | 2168 |
5 | 10486 |
6 | 50848 |
7 | 247024 |
8 | 1201730 |
9 | 5852530 |
10 | 28526860 |
11 | 139144760 |
12 | 679090456 |
13 | 3315836420 |
14 | 16196773236 |
15 | 79141717426 |
16 | 386812618952 |
17 | 1891013450430 |
18 | 9246370600422 |
19 | 45218609940844 |
20 | 221167392509842 |
[1,20,94,450,2168,10486,50848,247024,1201730, 5852530,28526860,139144760,679090456,3315836420, 16196773236,79141717426,386812618952, 1891013450430,9246370600422,45218609940844, 221167392509842] |