n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 5 |
4 | 14 |
5 | 47 |
6 | 180 |
7 | 773 |
8 | 3701 |
9 | 19488 |
10 | 111890 |
11 | 695786 |
12 | 4656185 |
13 | 33356828 |
14 | 254675642 |
15 | 2063984616 |
16 | 17694054723 |
17 | 159958176316 |
18 | 1520689121858 |
19 | 15165205111010 |
[1,1,2,5,14,47,180,773,3701,19488,111890,695786, 4656185,33356828,254675642,2063984616,17694054723, 159958176316,1520689121858,15165205111010] |