n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 4 |
3 | 10 |
4 | 28 |
5 | 148 |
6 | 714 |
7 | 6039 |
8 | 49623 |
9 | 697824 |
10 | 9570390 |
11 | 228608398 |
12 | 5268376882 |
13 | 211052632687 |
14 | 8181458661819 |
15 | 550685739585810 |
16 | 35868897568521948 |
17 | 4059582510922093828 |
18 | 444431993377350866570 |
19 | 84536428851931450778591 |
[1,2,4,10,28,148,714,6039,49623,697824,9570390, 228608398,5268376882,211052632687,8181458661819, 550685739585810,35868897568521948, 4059582510922093828,444431993377350866570, 84536428851931450778591] |