n | a(n) |
---|---|
0 | 0 |
1 | 0 |
2 | 1 |
3 | 3 |
4 | 0 |
5 | 10 |
6 | 75 |
7 | 126 |
8 | 196 |
9 | 1548 |
10 | 15525 |
11 | 39820 |
12 | 161106 |
13 | 358722 |
14 | 3705884 |
15 | 46623045 |
16 | 142988280 |
17 | 768721504 |
18 | 3560215293 |
19 | 12250746432 |
20 | 144581799790 |
21 | 2542575063630 |
22 | 8955836934660 |
23 | 55657973021431 |
24 | 319349051391228 |
25 | 1983548989621200 |
26 | 7898257536096850 |
[0,0,1,3,0,10,75,126,196,1548,15525,39820,161106, 358722,3705884,46623045,142988280,768721504, 3560215293,12250746432,144581799790,2542575063630, 8955836934660,55657973021431,319349051391228, 1983548989621200,7898257536096850] |