n | a(n) |
---|---|
0 | 0 |
1 | 0 |
2 | 0 |
3 | 0 |
4 | 1 |
5 | 1 |
6 | 6 |
7 | 14 |
8 | 28 |
9 | 53 |
10 | 122 |
11 | 275 |
12 | 597 |
13 | 1203 |
14 | 2456 |
15 | 5111 |
16 | 10573 |
17 | 21662 |
18 | 44553 |
19 | 91246 |
20 | 185422 |
21 | 377264 |
22 | 765956 |
23 | 1552001 |
24 | 3140326 |
25 | 6349270 |
26 | 12825847 |
27 | 25891832 |
[0,0,0,0,1,1,6,14,28,53,122,275,597,1203,2456, 5111,10573,21662,44553,91246,185422,377264,765956, 1552001,3140326,6349270,12825847,25891832] |