n | a(n) |
---|---|
1 | 1 |
2 | 1 |
3 | 2 |
4 | 3 |
5 | 6 |
6 | 39 |
7 | 209 |
8 | 947 |
9 | 4403 |
10 | 20825 |
11 | 95461 |
12 | 420312 |
13 | 1824610 |
14 | 7767715 |
15 | 32447127 |
16 | 133426790 |
17 | 540454735 |
18 | 2157136063 |
19 | 8491433827 |
20 | 32994222337 |
21 | 126618582468 |
22 | 480170037501 |
23 | 1800457116471 |
24 | 6678324836291 |
25 | 24515228772443 |
26 | 89097534819082 |
[1,1,2,3,6,39,209,947,4403,20825,95461,420312, 1824610,7767715,32447127,133426790,540454735, 2157136063,8491433827,32994222337,126618582468, 480170037501,1800457116471,6678324836291, 24515228772443,89097534819082] |