n | a(n) |
---|---|
1 | 1 |
2 | 2 |
3 | 4 |
4 | 10 |
5 | 27 |
6 | 75 |
7 | 221 |
8 | 662 |
9 | 2042 |
10 | 6402 |
11 | 20407 |
12 | 65828 |
13 | 214720 |
14 | 706600 |
15 | 2343767 |
16 | 7826752 |
17 | 26293468 |
18 | 88796471 |
19 | 301290197 |
20 | 1026595232 |
21 | 3511246069 |
22 | 12050780294 |
23 | 41488523002 |
24 | 143246116231 |
25 | 495881545520 |
26 | 1720771421470 |
27 | 5984652387281 |
28 | 20857113949868 |
29 | 72829214554641 |
30 | 254762923125929 |
[1,2,4,10,27,75,221,662,2042,6402,20407,65828, 214720,706600,2343767,7826752,26293468,88796471, 301290197,1026595232,3511246069,12050780294, 41488523002,143246116231,495881545520, 1720771421470,5984652387281,20857113949868, 72829214554641,254762923125929] |