n | a(n) |
---|---|
0 | 0 |
1 | 1 |
2 | 2 |
3 | 3 |
4 | 20 |
5 | 94 |
6 | 444 |
7 | 2101 |
8 | 9944 |
9 | 47061 |
10 | 222722 |
11 | 1054060 |
12 | 4988472 |
13 | 23608573 |
14 | 111730550 |
15 | 528778923 |
16 | 2502512960 |
17 | 11843458282 |
18 | 56050660404 |
19 | 265266821305 |
20 | 1255408695956 |
21 | 5941380026829 |
22 | 28118330498198 |
23 | 133073546286496 |
24 | 629787345390192 |
25 | 2980548061443481 |
26 | 14105819705015690 |
[0,1,2,3,20,94,444,2101,9944,47061,222722,1054060, 4988472,23608573,111730550,528778923,2502512960, 11843458282,56050660404,265266821305, 1255408695956,5941380026829,28118330498198, 133073546286496,629787345390192,2980548061443481, 14105819705015690] |