n | a(n) |
---|---|
0 | 0 |
1 | 1 |
2 | 2 |
3 | 6 |
4 | 20 |
5 | 70 |
6 | 252 |
7 | 924 |
8 | 3432 |
9 | 12705 |
10 | 45430 |
11 | 152438 |
12 | 472836 |
13 | 1352078 |
14 | 3578680 |
15 | 8827080 |
16 | 20439984 |
17 | 44745513 |
18 | 93185994 |
19 | 185640070 |
20 | 355452020 |
21 | 656846190 |
22 | 1175604980 |
23 | 2044130980 |
24 | 3462303000 |
25 | 5725877625 |
26 | 9264588606 |
27 | 14692562262 |
28 | 22874204836 |
29 | 35009334470 |
[0,1,2,6,20,70,252,924,3432,12705,45430,152438, 472836,1352078,3578680,8827080,20439984,44745513, 93185994,185640070,355452020,656846190,1175604980, 2044130980,3462303000,5725877625,9264588606, 14692562262,22874204836,35009334470] |