n | a(n) |
---|---|
0 | 0 |
1 | 0 |
2 | 1 |
3 | 2 |
4 | 5 |
5 | 10 |
6 | 21 |
7 | 42 |
8 | 84 |
9 | 168 |
10 | 330 |
11 | 660 |
12 | 1287 |
13 | 2574 |
14 | 5005 |
15 | 10010 |
16 | 19448 |
17 | 38896 |
18 | 75582 |
19 | 151164 |
20 | 293930 |
21 | 587860 |
22 | 1144066 |
23 | 2288132 |
24 | 4457400 |
25 | 8914800 |
26 | 17383860 |
27 | 34767720 |
28 | 67863915 |
29 | 135727830 |
30 | 265182525 |
31 | 530365050 |
32 | 1037158320 |
33 | 2074316640 |
[0,0,1,2,5,10,21,42,84,168,330,660,1287,2574,5005, 10010,19448,38896,75582,151164,293930,587860, 1144066,2288132,4457400,8914800,17383860,34767720, 67863915,135727830,265182525,530365050,1037158320, 2074316640] |