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A104237 as a simple table

na(n)
01
1-2
25
3-11
426
5-53
6104
7-198
8375
9-700
101299
11-2401
124432
13-8167
1415038
15-27676
1650925
17-93686
18172337
19-316999
20583078
21-1072473
221972612
23-3628226
246673379
25-12274288
2622575967
27-41523709
2876374044
29-140473803
30258371642

[1,-2,5,-11,26,-53,104,-198,375,-700,1299,-2401,
 4432,-8167,15038,-27676,50925,-93686,172337,
 -316999,583078,-1072473,1972612,-3628226,6673379,
 -12274288,22575967,-41523709,76374044,-140473803,
 258371642]