n | a(n) |
---|---|
0 | 0 |
1 | 0 |
2 | 0 |
3 | 1 |
4 | 4 |
5 | 10 |
6 | 20 |
7 | 35 |
8 | 57 |
9 | 93 |
10 | 165 |
11 | 330 |
12 | 715 |
13 | 1574 |
14 | 3381 |
15 | 6995 |
16 | 13990 |
17 | 27370 |
18 | 53143 |
19 | 103702 |
20 | 204820 |
21 | 409640 |
22 | 826045 |
23 | 1669801 |
24 | 3368259 |
25 | 6765175 |
26 | 13530350 |
27 | 26985675 |
28 | 53774932 |
29 | 107232053 |
30 | 214146295 |
31 | 428292590 |
32 | 857417220 |
33 | 1717012749 |
34 | 3437550076 |
[0,0,0,1,4,10,20,35,57,93,165,330,715,1574,3381, 6995,13990,27370,53143,103702,204820,409640, 826045,1669801,3368259,6765175,13530350,26985675, 53774932,107232053,214146295,428292590,857417220, 1717012749,3437550076] |