n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 3 |
3 | 6 |
4 | 16 |
5 | 52 |
6 | 169 |
7 | 556 |
8 | 1902 |
9 | 6667 |
10 | 23665 |
11 | 85062 |
12 | 309444 |
13 | 1136400 |
14 | 4205944 |
15 | 15675690 |
16 | 58785582 |
17 | 221644054 |
18 | 839692735 |
19 | 3194875093 |
20 | 12203132521 |
21 | 46774765206 |
22 | 179861164503 |
23 | 693632630011 |
24 | 2682150035748 |
25 | 10396942423617 |
26 | 40393878209664 |
27 | 157267923352012 |
28 | 613499893576207 |
[1,1,3,6,16,52,169,556,1902,6667,23665,85062, 309444,1136400,4205944,15675690,58785582, 221644054,839692735,3194875093,12203132521, 46774765206,179861164503,693632630011, 2682150035748,10396942423617,40393878209664, 157267923352012,613499893576207] |