n | a(n) |
---|---|
1 | 0 |
2 | 0 |
3 | 0 |
4 | 0 |
5 | 0 |
6 | 0 |
7 | 1 |
8 | 63 |
9 | 1232 |
10 | 13104 |
11 | 94500 |
12 | 518364 |
13 | 2317392 |
14 | 8833968 |
15 | 29630601 |
16 | 89464375 |
17 | 247351104 |
18 | 634542272 |
19 | 1526183568 |
20 | 3470399856 |
21 | 7511688000 |
22 | 15564217536 |
23 | 31016698713 |
24 | 59686024167 |
25 | 111284511184 |
26 | 201628350000 |
27 | 355896440900 |
28 | 613353440700 |
29 | 1034083486800 |
[0,0,0,0,0,0,1,63,1232,13104,94500,518364,2317392, 8833968,29630601,89464375,247351104,634542272, 1526183568,3470399856,7511688000,15564217536, 31016698713,59686024167,111284511184,201628350000, 355896440900,613353440700,1034083486800] |