n | a(n) |
---|---|
0 | 0 |
1 | 0 |
2 | 0 |
3 | 0 |
4 | 1 |
5 | 20 |
6 | 120 |
7 | 455 |
8 | 1330 |
9 | 3276 |
10 | 7140 |
11 | 14190 |
12 | 26235 |
13 | 45760 |
14 | 76076 |
15 | 121485 |
16 | 187460 |
17 | 280840 |
18 | 410040 |
19 | 585276 |
20 | 818805 |
21 | 1125180 |
22 | 1521520 |
23 | 2027795 |
24 | 2667126 |
25 | 3466100 |
26 | 4455100 |
27 | 5668650 |
28 | 7145775 |
29 | 8930376 |
30 | 11071620 |
31 | 13624345 |
32 | 16649480 |
33 | 20214480 |
[0,0,0,0,1,20,120,455,1330,3276,7140,14190,26235, 45760,76076,121485,187460,280840,410040,585276, 818805,1125180,1521520,2027795,2667126,3466100, 4455100,5668650,7145775,8930376,11071620,13624345, 16649480,20214480] |