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A010102 as a simple table

na(n)
01
10
20
30
4-1
50
60
7-4
83
90
10-30
1148
12-52
13-120
14368
15-612
16-254
172524
18-6216
194040
2011805
21-49400
2268268
2314928
24-332511
25734508
26-568038
27-1641320
286202774
29-9239676
30-2503162
3142749908
32-99021392
3372255812
34215763902

[1,0,0,0,-1,0,0,-4,3,0,-30,48,-52,-120,368,-612,
 -254,2524,-6216,4040,11805,-49400,68268,14928,
 -332511,734508,-568038,-1641320,6202774,-9239676,
 -2503162,42749908,-99021392,72255812,215763902]