n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 1 |
3 | 2 |
4 | 4 |
5 | 9 |
6 | 19 |
7 | 45 |
8 | 106 |
9 | 260 |
10 | 642 |
11 | 1614 |
12 | 4074 |
13 | 10356 |
14 | 26341 |
15 | 67093 |
16 | 170735 |
17 | 434149 |
18 | 1102279 |
19 | 2794856 |
20 | 7075440 |
21 | 17887216 |
22 | 45157381 |
23 | 113859010 |
24 | 286737286 |
25 | 721310274 |
26 | 1812628225 |
27 | 4550676482 |
28 | 11414249153 |
29 | 28605296518 |
30 | 71629527442 |
[1,1,1,2,4,9,19,45,106,260,642,1614,4074,10356, 26341,67093,170735,434149,1102279,2794856,7075440, 17887216,45157381,113859010,286737286,721310274, 1812628225,4550676482,11414249153,28605296518, 71629527442] |