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A108623 as a simple table

na(n)
11
20
3-1
4-1
51
64
73
8-8
9-23
10-10
1167
12153
139
14-586
15-1081
16439
175249
187734
19-7941
20-47501
21-53791
22105314
23430119
24343044
25-1249799
26-3866556
27-1730017
2813996097
2934243897
301947204
31-150962373
32-296101864
33121857185
341582561870

[1,0,-1,-1,1,4,3,-8,-23,-10,67,153,9,-586,-1081,
 439,5249,7734,-7941,-47501,-53791,105314,430119,
 343044,-1249799,-3866556,-1730017,13996097,
 34243897,1947204,-150962373,-296101864,121857185,
 1582561870]