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A228548 as a simple table

na(n)
11
2-2
33
43
5-7
6-5
712
8-19
9-52
10-52
11-20
1273
13-919
146209
152206
16-1869
17-8835
18-4021
1923202
20-122489
21-174347
221106682
231114088
24388318
25-7528057
2655753005
2781020413
28-530178192
29-6348221604
30101952770365
31-371734984964
32-16091176203501
3390823940064758
34163339092651834
35-3480231557696967

[1,-2,3,3,-7,-5,12,-19,-52,-52,-20,73,-919,6209,
 2206,-1869,-8835,-4021,23202,-122489,-174347,
 1106682,1114088,388318,-7528057,55753005,81020413,
 -530178192,-6348221604,101952770365,-371734984964,
 -16091176203501,90823940064758,163339092651834,
 -3480231557696967]