n | a(n) |
---|---|
1 | 0 |
2 | 1 |
3 | 2 |
4 | 7 |
5 | 22 |
6 | 74 |
7 | 252 |
8 | 875 |
9 | 3078 |
10 | 10950 |
11 | 39316 |
12 | 142278 |
13 | 518364 |
14 | 1899668 |
15 | 6997688 |
16 | 25894579 |
17 | 96211398 |
18 | 358779118 |
19 | 1342323364 |
20 | 5037146738 |
21 | 18953759988 |
22 | 71497359884 |
23 | 270321915848 |
24 | 1024217489278 |
25 | 3888253473180 |
26 | 14787937448380 |
27 | 56337410614088 |
28 | 214967841333868 |
29 | 821473056041464 |
30 | 3143521372849960 |
[0,1,2,7,22,74,252,875,3078,10950,39316,142278, 518364,1899668,6997688,25894579,96211398, 358779118,1342323364,5037146738,18953759988, 71497359884,270321915848,1024217489278, 3888253473180,14787937448380,56337410614088, 214967841333868,821473056041464,3143521372849960] |