n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 25 |
3 | 61 |
4 | 336 |
5 | 1200 |
6 | 3600 |
7 | 13500 |
8 | 32400 |
9 | 118800 |
10 | 259200 |
11 | 939600 |
12 | 1944000 |
13 | 6998400 |
14 | 13996800 |
15 | 50155200 |
16 | 97977600 |
17 | 349920000 |
18 | 671846400 |
19 | 2393452800 |
20 | 4534963200 |
21 | 16124313600 |
22 | 30233088000 |
23 | 107327462400 |
24 | 199538380800 |
25 | 707454259200 |
26 | 1306069401600 |
27 | 4625662464000 |
28 | 8489451110400 |
[1,1,25,61,336,1200,3600,13500,32400,118800, 259200,939600,1944000,6998400,13996800,50155200, 97977600,349920000,671846400,2393452800, 4534963200,16124313600,30233088000,107327462400, 199538380800,707454259200,1306069401600, 4625662464000,8489451110400] |