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A134825 as a simple table

na(n)
01
10
2-1
30
4-1
50
6-1
71
8-8
954
10-530
116192
12-86581
131425517
14-27298232
15601580873
16-15116315768
17429614643061
18-13711655205089
19488332318973593
20-19296579341940069
21841693047573682615
22-40338071854059455414
232115074863808199160560
24-120866265222965259346028

[1,0,-1,0,-1,0,-1,1,-8,54,-530,6192,-86581,
 1425517,-27298232,601580873,-15116315768,
 429614643061,-13711655205089,488332318973593,
 -19296579341940069,841693047573682615,
 -40338071854059455414,2115074863808199160560,
 -120866265222965259346028]