n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 21 |
3 | 85 |
4 | 747 |
5 | 4375 |
6 | 31387 |
7 | 202841 |
8 | 1382259 |
9 | 9167119 |
10 | 61643709 |
11 | 411595537 |
12 | 2758179839 |
13 | 18448963469 |
14 | 123518353059 |
15 | 826573277157 |
16 | 5532716266089 |
17 | 37028886137273 |
18 | 247839719105625 |
19 | 1658772577825883 |
20 | 11102227136885119 |
[1,1,21,85,747,4375,31387,202841,1382259,9167119, 61643709,411595537,2758179839,18448963469, 123518353059,826573277157,5532716266089, 37028886137273,247839719105625,1658772577825883, 11102227136885119] |