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A186195 as a simple table

na(n)
01
11
20
3-2
42
56
6-18
7-6
8114
9-146
10-490
111794
12266
13-12986
1420958
1556778
16-255774
1739390
181853478
19-3687918
20-7441158
2142252726
22-20345490
23-293463462
24708206802
251002083406
26-7527677898
276140678434
2848978210794
29-142206136026
30-127715768578

[1,1,0,-2,2,6,-18,-6,114,-146,-490,1794,266,
 -12986,20958,56778,-255774,39390,1853478,-3687918,
 -7441158,42252726,-20345490,-293463462,708206802,
 1002083406,-7527677898,6140678434,48978210794,
 -142206136026,-127715768578]