n | a(n) |
---|---|
0 | 1 |
1 | 4 |
2 | 17 |
3 | 73 |
4 | 312 |
5 | 1333 |
6 | 5697 |
7 | 24348 |
8 | 104057 |
9 | 444713 |
10 | 1900592 |
11 | 8122653 |
12 | 34714177 |
13 | 148359668 |
14 | 634051937 |
15 | 2709778633 |
16 | 11580912872 |
17 | 49493911173 |
18 | 211524537857 |
19 | 904002715788 |
20 | 3863480419017 |
21 | 16511544365353 |
22 | 70566191040352 |
[1,4,17,73,312,1333,5697,24348,104057,444713, 1900592,8122653,34714177,148359668,634051937, 2709778633,11580912872,49493911173,211524537857, 904002715788,3863480419017,16511544365353, 70566191040352] |