n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 1 |
3 | 2 |
4 | 4 |
5 | 9 |
6 | 20 |
7 | 47 |
8 | 107 |
9 | 249 |
10 | 573 |
11 | 1319 |
12 | 3010 |
13 | 6859 |
14 | 15534 |
15 | 35095 |
16 | 78964 |
17 | 177209 |
18 | 396434 |
19 | 884767 |
20 | 1969496 |
21 | 4374573 |
22 | 9694994 |
23 | 21443195 |
24 | 47333594 |
25 | 104291391 |
26 | 229373393 |
27 | 503609582 |
28 | 1103877079 |
29 | 2415752264 |
30 | 5278467730 |
[1,1,1,2,4,9,20,47,107,249,573,1319,3010,6859, 15534,35095,78964,177209,396434,884767,1969496, 4374573,9694994,21443195,47333594,104291391, 229373393,503609582,1103877079,2415752264, 5278467730] |