n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 3 |
3 | 10 |
4 | 34 |
5 | 117 |
6 | 407 |
7 | 1430 |
8 | 5070 |
9 | 18122 |
10 | 65246 |
11 | 236436 |
12 | 861764 |
13 | 3157325 |
14 | 11622015 |
15 | 42961470 |
16 | 159419670 |
17 | 593636670 |
18 | 2217608250 |
19 | 8308432140 |
20 | 31212003420 |
21 | 117544456770 |
22 | 443690433654 |
23 | 1678353186780 |
24 | 6361322162444 |
[1,1,3,10,34,117,407,1430,5070,18122,65246,236436, 861764,3157325,11622015,42961470,159419670, 593636670,2217608250,8308432140,31212003420, 117544456770,443690433654,1678353186780, 6361322162444] |