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A286390 as a simple table

na(n)
00
12
2-1
33
4-5
57
6-12
720
8-31
951
10-83
11133
12-216
13350
14-565
15915
16-1481
172395
18-3876
196272
20-10147
2116419
22-26567
2342985
24-69552
25112538
26-182089
27294627
28-476717
29771343
30-1248060
312019404
32-3267463
335286867
34-8554331
3513841197
36-22395528
3736236726

[0,2,-1,3,-5,7,-12,20,-31,51,-83,133,-216,350,
 -565,915,-1481,2395,-3876,6272,-10147,16419,
 -26567,42985,-69552,112538,-182089,294627,-476717,
 771343,-1248060,2019404,-3267463,5286867,-8554331,
 13841197,-22395528,36236726]