n | a(n) |
---|---|
1 | 0 |
2 | 0 |
3 | 0 |
4 | 1 |
5 | 4 |
6 | 8 |
7 | 20 |
8 | 41 |
9 | 63 |
10 | 126 |
11 | 252 |
12 | 392 |
13 | 844 |
14 | 1780 |
15 | 2800 |
16 | 5995 |
17 | 12545 |
18 | 19595 |
19 | 41951 |
20 | 88634 |
21 | 138866 |
22 | 299411 |
23 | 636524 |
24 | 997640 |
25 | 2154104 |
26 | 4594244 |
27 | 7201692 |
28 | 15584085 |
29 | 33355944 |
30 | 52311408 |
31 | 113406028 |
32 | 243374923 |
33 | 381766253 |
34 | 828748052 |
[0,0,0,1,4,8,20,41,63,126,252,392,844,1780,2800, 5995,12545,19595,41951,88634,138866,299411,636524, 997640,2154104,4594244,7201692,15584085,33355944, 52311408,113406028,243374923,381766253,828748052] |