login

A075263 as a simple table

na(n)
01
11
2-1
32
4-3
51
66
7-12
87
9-1
1024
11-60
1250
13-15
141
15120
16-360
17390
18-180
1931
20-1
21720
22-2520
233360
24-2100
25602
26-63
271
285040
29-20160
3031920
31-25200
3210206
33-1932
34127
35-1
3640320
37-181440
38332640
39-317520
40166824
41-46620
426050
43-255
441
45362880
46-1814400
473780000
48-4233600
492739240
50-1020600
51204630
52-18660
53511
54-1

[1,1,-1,2,-3,1,6,-12,7,-1,24,-60,50,-15,1,120,
 -360,390,-180,31,-1,720,-2520,3360,-2100,602,-63,
 1,5040,-20160,31920,-25200,10206,-1932,127,-1,
 40320,-181440,332640,-317520,166824,-46620,6050,
 -255,1,362880,-1814400,3780000,-4233600,2739240,
 -1020600,204630,-18660,511,-1]