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A157491 as a simple table

na(n)
01
10
21
30
4-1
52
60
72
8-6
95
100
11-5
1220
13-28
1414
150
1614
17-70
18135
19-120
2042
210
22-42
23252
24-616
25770
26-495
27132
280
29132
30-924
312730
32-4368
334004
34-2002
35429
360
37-429
383432
39-11880
4023100
41-27300
4219656
43-8008
441430

[1,0,1,0,-1,2,0,2,-6,5,0,-5,20,-28,14,0,14,-70,
 135,-120,42,0,-42,252,-616,770,-495,132,0,132,
 -924,2730,-4368,4004,-2002,429,0,-429,3432,-11880,
 23100,-27300,19656,-8008,1430]