n | a(n) |
---|---|
0 | 1 |
1 | 0 |
2 | 2 |
3 | 3 |
4 | 6 |
5 | 20 |
6 | 35 |
7 | 105 |
8 | 238 |
9 | 588 |
10 | 1512 |
11 | 3630 |
12 | 9339 |
13 | 23166 |
14 | 58487 |
15 | 148148 |
16 | 373230 |
17 | 949416 |
18 | 2406248 |
19 | 6122142 |
20 | 15591856 |
21 | 39729000 |
22 | 101432982 |
23 | 259049230 |
24 | 662421643 |
25 | 1695149220 |
26 | 4341026900 |
27 | 11125755615 |
28 | 28530984915 |
29 | 73213888650 |
30 | 187980163110 |
31 | 482906682675 |
[1,0,2,3,6,20,35,105,238,588,1512,3630,9339,23166, 58487,148148,373230,949416,2406248,6122142, 15591856,39729000,101432982,259049230,662421643, 1695149220,4341026900,11125755615,28530984915, 73213888650,187980163110,482906682675] |