n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 6 |
4 | 21 |
5 | 73 |
6 | 238 |
7 | 722 |
8 | 2054 |
9 | 5541 |
10 | 14323 |
11 | 35788 |
12 | 87043 |
13 | 207201 |
14 | 484772 |
15 | 1118334 |
16 | 2550164 |
17 | 5759101 |
18 | 12899521 |
19 | 28689880 |
20 | 63419177 |
21 | 139435017 |
22 | 305102778 |
23 | 664755562 |
24 | 1442788402 |
25 | 3120497429 |
26 | 6727583999 |
27 | 14461863108 |
28 | 31004177695 |
29 | 66303416497 |
30 | 141465316864 |
31 | 301184381814 |
32 | 639949891424 |
[1,1,2,6,21,73,238,722,2054,5541,14323,35788, 87043,207201,484772,1118334,2550164,5759101, 12899521,28689880,63419177,139435017,305102778, 664755562,1442788402,3120497429,6727583999, 14461863108,31004177695,66303416497,141465316864, 301184381814,639949891424] |