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A232603 as a simple table

na(n)
00
1-1
22
3-5
46
5-13
610
7-29
86
9-69
10-38
11-197
12-250
13-669
14-1142
15-2509
16-4762
17-9813
18-19302
19-38965
20-77530
21-155501
22-310518
23-621565
24-1242554
25-2485733
26-4970790
27-9942309
28-19883834
29-39768509
30-79536118

[0,-1,2,-5,6,-13,10,-29,6,-69,-38,-197,-250,-669,
 -1142,-2509,-4762,-9813,-19302,-38965,-77530,
 -155501,-310518,-621565,-1242554,-2485733,
 -4970790,-9942309,-19883834,-39768509,-79536118]