n | a(n) |
---|---|
0 | 1 |
1 | 0 |
2 | 2 |
3 | 2 |
4 | 13 |
5 | 34 |
6 | 158 |
7 | 594 |
8 | 2665 |
9 | 11558 |
10 | 53320 |
11 | 247488 |
12 | 1181266 |
13 | 5708884 |
14 | 28049474 |
15 | 139417402 |
16 | 701063005 |
17 | 3559326294 |
18 | 18233244530 |
19 | 94140532624 |
20 | 489573775236 |
21 | 2562613997512 |
22 | 13493827469116 |
23 | 71441865994904 |
[1,0,2,2,13,34,158,594,2665,11558,53320,247488, 1181266,5708884,28049474,139417402,701063005, 3559326294,18233244530,94140532624,489573775236, 2562613997512,13493827469116,71441865994904] |