n | a(n) |
---|---|
0 | 1 |
1 | 3 |
2 | 10 |
3 | 39 |
4 | 180 |
5 | 977 |
6 | 6156 |
7 | 44401 |
8 | 361872 |
9 | 3295025 |
10 | 33193284 |
11 | 366828033 |
12 | 4414938000 |
13 | 57501795977 |
14 | 805984165252 |
15 | 12098920460089 |
16 | 193676009792768 |
17 | 3293501718960033 |
18 | 59294599560573508 |
19 | 1126737323074730161 |
20 | 22536528123718353104 |
21 | 473290909667471110361 |
[1,3,10,39,180,977,6156,44401,361872,3295025, 33193284,366828033,4414938000,57501795977, 805984165252,12098920460089,193676009792768, 3293501718960033,59294599560573508, 1126737323074730161,22536528123718353104, 473290909667471110361] |