n | a(n) |
---|---|
0 | 0 |
1 | 0 |
2 | 0 |
3 | 1 |
4 | 5 |
5 | 18 |
6 | 52 |
7 | 134 |
8 | 318 |
9 | 713 |
10 | 1531 |
11 | 3180 |
12 | 6432 |
13 | 12732 |
14 | 24756 |
15 | 47417 |
16 | 89665 |
17 | 167694 |
18 | 310628 |
19 | 570562 |
20 | 1040226 |
21 | 1883953 |
22 | 3391799 |
23 | 6073848 |
24 | 10824096 |
25 | 19204536 |
26 | 33936456 |
[0,0,0,1,5,18,52,134,318,713,1531,3180,6432,12732, 24756,47417,89665,167694,310628,570562,1040226, 1883953,3391799,6073848,10824096,19204536, 33936456] |