n | a(n) |
---|---|
0 | 0 |
1 | 0 |
2 | 1 |
3 | 2 |
4 | 9 |
5 | 22 |
6 | 77 |
7 | 210 |
8 | 673 |
9 | 1934 |
10 | 5973 |
11 | 17578 |
12 | 53417 |
13 | 158886 |
14 | 479389 |
15 | 1432706 |
16 | 4309041 |
17 | 12905278 |
18 | 38759525 |
19 | 116191194 |
20 | 348748345 |
21 | 1045895510 |
22 | 3138385581 |
23 | 9413758642 |
24 | 28244072129 |
25 | 84726623982 |
26 | 254191056757 |
27 | 762550800650 |
28 | 2287697141193 |
29 | 6863001945094 |
[0,0,1,2,9,22,77,210,673,1934,5973,17578,53417, 158886,479389,1432706,4309041,12905278,38759525, 116191194,348748345,1045895510,3138385581, 9413758642,28244072129,84726623982,254191056757, 762550800650,2287697141193,6863001945094] |