n | a(n) |
---|---|
1 | 2 |
2 | 8 |
3 | 30 |
4 | 112 |
5 | 420 |
6 | 1576 |
7 | 5912 |
8 | 22176 |
9 | 83184 |
10 | 312032 |
11 | 1170464 |
12 | 4390528 |
13 | 16469312 |
14 | 61778048 |
15 | 231735680 |
16 | 869263872 |
17 | 3260696320 |
18 | 12231200256 |
19 | 45880463872 |
20 | 172102240256 |
21 | 645572834304 |
22 | 2421608712192 |
23 | 9083698141184 |
24 | 34073866477568 |
[2,8,30,112,420,1576,5912,22176,83184,312032, 1170464,4390528,16469312,61778048,231735680, 869263872,3260696320,12231200256,45880463872, 172102240256,645572834304,2421608712192, 9083698141184,34073866477568] |