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A182867 as a simple table

na(n)
01
11
2-4
31
4-20
564
61
7-56
8784
9-2304
101
11-120
124368
13-52480
14147456
151
16-220
1716368
18-489280
195395456
20-14745600
211
22-364
2348048
24-2846272
2575851776
26-791691264
272123366400
281
29-560
30119392
31-12263680
32633721088
33-15658639360
34157294854144
35-416179814400
361
37-816
38262752
39-42828032
403773223168
41-177891237888
424165906530304
43-40683662475264
44106542032486400
451
46-1140
47527136
48-127959680
4917649505536
50-1400415544320
5161802667606016
52-1390437378293760
5313288048674471936
54-34519618525593600

[1,1,-4,1,-20,64,1,-56,784,-2304,1,-120,4368,
 -52480,147456,1,-220,16368,-489280,5395456,
 -14745600,1,-364,48048,-2846272,75851776,
 -791691264,2123366400,1,-560,119392,-12263680,
 633721088,-15658639360,157294854144,-416179814400,
 1,-816,262752,-42828032,3773223168,-177891237888,
 4165906530304,-40683662475264,106542032486400,1,
 -1140,527136,-127959680,17649505536,
 -1400415544320,61802667606016,-1390437378293760,
 13288048674471936,-34519618525593600]