n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 5 |
4 | 16 |
5 | 60 |
6 | 257 |
7 | 1218 |
8 | 6270 |
9 | 34530 |
10 | 201223 |
11 | 1230168 |
12 | 7836622 |
13 | 51738649 |
14 | 352457285 |
15 | 2468427794 |
16 | 17718840472 |
17 | 130027678901 |
18 | 973357030743 |
19 | 7418717413322 |
20 | 57477823445999 |
21 | 452035218046890 |
22 | 3604179615488962 |
23 | 29102380883498470 |
24 | 237748924887335003 |
[1,1,2,5,16,60,257,1218,6270,34530,201223,1230168, 7836622,51738649,352457285,2468427794,17718840472, 130027678901,973357030743,7418717413322, 57477823445999,452035218046890,3604179615488962, 29102380883498470,237748924887335003] |