n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 14 |
3 | 68 |
4 | 406 |
5 | 2332 |
6 | 13964 |
7 | 83848 |
8 | 509926 |
9 | 3118892 |
10 | 19194724 |
11 | 118654648 |
12 | 736365436 |
13 | 4584612632 |
14 | 28623792344 |
15 | 179142212368 |
16 | 1123532958086 |
17 | 7059622447052 |
18 | 44431918660724 |
19 | 280059644507608 |
20 | 1767597777222676 |
[1,2,14,68,406,2332,13964,83848,509926,3118892, 19194724,118654648,736365436,4584612632, 28623792344,179142212368,1123532958086, 7059622447052,44431918660724,280059644507608, 1767597777222676] |