n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 4 |
3 | 9 |
4 | 20 |
5 | 44 |
6 | 96 |
7 | 209 |
8 | 455 |
9 | 991 |
10 | 2159 |
11 | 4704 |
12 | 10249 |
13 | 22330 |
14 | 48651 |
15 | 105997 |
16 | 230938 |
17 | 503150 |
18 | 1096225 |
19 | 2388372 |
20 | 5203604 |
21 | 11337218 |
22 | 24700671 |
23 | 53815949 |
24 | 117250109 |
25 | 255455647 |
26 | 556567394 |
27 | 1212606837 |
28 | 2641935832 |
29 | 5756049469 |
30 | 12540844137 |
[1,2,4,9,20,44,96,209,455,991,2159,4704,10249, 22330,48651,105997,230938,503150,1096225,2388372, 5203604,11337218,24700671,53815949,117250109, 255455647,556567394,1212606837,2641935832, 5756049469,12540844137] |