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A122161 as a simple table

na(n)
11
2-2
31
4-4
50
6-9
7-5
8-23
9-24
10-65
11-90
12-196
13-311
14-613
15-1039
16-1954
17-3419
18-6288
19-11172
20-20329
21-36385
22-65871
23-118312
24-213669
25-384422
26-693448
27-1248623
28-2251097
29-4054895
30-7308466
31-13167159
32-23729196
33-42755048
34-77046281
35-138827181
36-250164695
37-450772776

[1,-2,1,-4,0,-9,-5,-23,-24,-65,-90,-196,-311,-613,
 -1039,-1954,-3419,-6288,-11172,-20329,-36385,
 -65871,-118312,-213669,-384422,-693448,-1248623,
 -2251097,-4054895,-7308466,-13167159,-23729196,
 -42755048,-77046281,-138827181,-250164695,
 -450772776]