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A006828 as a simple table

na(n)
10
2-1
32
4-2
51
636
71
8-485
9-27
10-98
1123
12-86
13-13
1416
15577
16-16
17-13823
1814439374
19-9
201
21-91167
2225899588
23-95
24-4443
25-125
26-1414178
2757
28330206
29-74879
301975104
316913
3267
33-33
3464926
351351
36-571878
37-267790150327167
383745
39-159

[0,-1,2,-2,1,36,1,-485,-27,-98,23,-86,-13,16,577,
 -16,-13823,14439374,-9,1,-91167,25899588,-95,
 -4443,-125,-1414178,57,330206,-74879,1975104,6913,
 67,-33,64926,1351,-571878,-267790150327167,3745,
 -159]