n | a(n) |
---|---|
7 | 1 |
8 | 7 |
9 | 56 |
10 | 420 |
11 | 3360 |
12 | 28182 |
13 | 250404 |
14 | 2354352 |
15 | 23408385 |
16 | 245710465 |
17 | 2717803088 |
18 | 31615680096 |
19 | 386038045848 |
20 | 4938320959740 |
21 | 66064056802800 |
22 | 922665034672080 |
23 | 13431181585022355 |
24 | 203477178533784540 |
25 | 3203526845947149260 |
26 | 52344335808818684400 |
27 | 886527902050136045700 |
[1,7,56,420,3360,28182,250404,2354352,23408385, 245710465,2717803088,31615680096,386038045848, 4938320959740,66064056802800,922665034672080, 13431181585022355,203477178533784540, 3203526845947149260,52344335808818684400, 886527902050136045700] |