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A108624 as a simple table

na(n)
11
20
3-1
41
51
6-4
73
88
9-23
1010
1167
12-153
139
14586
15-1081
16-439
175249
18-7734
19-7941
2047501
21-53791
22-105314
23430119
24-343044
25-1249799
263866556
27-1730017
28-13996097
2934243897
30-1947204
31-150962373
32296101864
33121857185

[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]