n | a(n) |
---|---|
1 | 1 |
2 | 1 |
3 | 2 |
4 | 5 |
5 | 19 |
6 | 90 |
7 | 510 |
8 | 3395 |
9 | 25831 |
10 | 221140 |
11 | 2104310 |
12 | 22027170 |
13 | 251540795 |
14 | 3111928820 |
15 | 41460769350 |
16 | 591847005749 |
17 | 9011786683883 |
18 | 145794610986004 |
19 | 2497443795363566 |
20 | 45157627509568965 |
21 | 859494143391347310 |
22 | 17176870199851102510 |
23 | 359623890969235361700 |
[1,1,2,5,19,90,510,3395,25831,221140,2104310, 22027170,251540795,3111928820,41460769350, 591847005749,9011786683883,145794610986004, 2497443795363566,45157627509568965, 859494143391347310,17176870199851102510, 359623890969235361700] |