n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 5 |
3 | 14 |
4 | 42 |
5 | 144 |
6 | 563 |
7 | 2526 |
8 | 12877 |
9 | 73778 |
10 | 469616 |
11 | 3288428 |
12 | 25121097 |
13 | 207902202 |
14 | 1852961189 |
15 | 17694468210 |
16 | 180234349762 |
17 | 1950592724756 |
18 | 22352145975707 |
19 | 270366543452702 |
20 | 3442413745494957 |
21 | 46021681757269830 |
[1,2,5,14,42,144,563,2526,12877,73778,469616, 3288428,25121097,207902202,1852961189,17694468210, 180234349762,1950592724756,22352145975707, 270366543452702,3442413745494957, 46021681757269830] |