n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 3 |
3 | 10 |
4 | 40 |
5 | 155 |
6 | 660 |
7 | 2794 |
8 | 12298 |
9 | 54508 |
10 | 246019 |
11 | 1118974 |
12 | 5142467 |
13 | 23787738 |
14 | 110771042 |
15 | 518450180 |
16 | 2438101647 |
17 | 11510929374 |
18 | 54541727014 |
19 | 259238260109 |
20 | 1235642708801 |
21 | 5904368990845 |
22 | 28277470823716 |
23 | 135705458477891 |
24 | 652478353351991 |
25 | 3142499715336928 |
26 | 15158778568759899 |
27 | 73228161288914446 |
[1,1,3,10,40,155,660,2794,12298,54508,246019, 1118974,5142467,23787738,110771042,518450180, 2438101647,11510929374,54541727014,259238260109, 1235642708801,5904368990845,28277470823716, 135705458477891,652478353351991,3142499715336928, 15158778568759899,73228161288914446] |