n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 9 |
4 | 32 |
5 | 85 |
6 | 240 |
7 | 588 |
8 | 1512 |
9 | 3564 |
10 | 8700 |
11 | 19965 |
12 | 47124 |
13 | 105963 |
14 | 244244 |
15 | 540540 |
16 | 1224080 |
17 | 2674984 |
18 | 5974956 |
19 | 12924522 |
20 | 28553200 |
21 | 61250490 |
22 | 134104432 |
23 | 285689624 |
24 | 620826672 |
25 | 1314933000 |
26 | 2839363800 |
27 | 5984393805 |
28 | 12852021420 |
29 | 26973910215 |
30 | 57655813500 |
31 | 120569654700 |
32 | 256649540640 |
33 | 535009931280 |
34 | 1134692142540 |
35 | 2358818719950 |
36 | 4986548028000 |
37 | 10340761857030 |
38 | 21796919253120 |
39 | 45102668144040 |
40 | 94821703158000 |
[1,1,2,9,32,85,240,588,1512,3564,8700,19965,47124, 105963,244244,540540,1224080,2674984,5974956, 12924522,28553200,61250490,134104432,285689624, 620826672,1314933000,2839363800,5984393805, 12852021420,26973910215,57655813500,120569654700, 256649540640,535009931280,1134692142540, 2358818719950,4986548028000,10340761857030, 21796919253120,45102668144040,94821703158000] |