n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 5 |
4 | 15 |
5 | 52 |
6 | 202 |
7 | 861 |
8 | 3970 |
9 | 19596 |
10 | 102703 |
11 | 567867 |
12 | 3295439 |
13 | 19986462 |
14 | 126231946 |
15 | 827759525 |
16 | 5621051650 |
17 | 39439867696 |
18 | 285368007479 |
19 | 2125566382124 |
20 | 16273261632111 |
21 | 127881070062521 |
22 | 1030221084660031 |
23 | 8498826714433335 |
24 | 71721238761675612 |
25 | 618573094313147709 |
[1,1,2,5,15,52,202,861,3970,19596,102703,567867, 3295439,19986462,126231946,827759525,5621051650, 39439867696,285368007479,2125566382124, 16273261632111,127881070062521,1030221084660031, 8498826714433335,71721238761675612, 618573094313147709] |