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A144031 as a simple table

na(n)
11
21
30
4-2
5-6
6-10
7-13
8-10
94
1036
1184
12137
13159
1494
15-133
16-573
17-1197
18-1788
19-1864
20-647
212741
228784
2316631
2422920
2520769
2687
27-49372
28-130497
29-226511
30-286165
31-214344
32117678
33822398
341889427
353022590
363465187
371927286
38-3188290
39-13016609
40-26739085

[1,1,0,-2,-6,-10,-13,-10,4,36,84,137,159,94,-133,
 -573,-1197,-1788,-1864,-647,2741,8784,16631,22920,
 20769,87,-49372,-130497,-226511,-286165,-214344,
 117678,822398,1889427,3022590,3465187,1927286,
 -3188290,-13016609,-26739085]