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A110513 as a simple table

na(n)
01
1-1
22
3-5
411
5-24
653
7-117
8258
9-569
101255
11-2768
126105
13-13465
1429698
15-65501
16144467
17-318632
18702765
19-1549997
203418626
21-7540017
2216630031
23-36678688
2480897393
25-178424817
26393528322
27-867954037
281914332891
29-4222194104
309312342245
31-20539017381
3245300228866
33-99912799977

[1,-1,2,-5,11,-24,53,-117,258,-569,1255,-2768,
 6105,-13465,29698,-65501,144467,-318632,702765,
 -1549997,3418626,-7540017,16630031,-36678688,
 80897393,-178424817,393528322,-867954037,
 1914332891,-4222194104,9312342245,-20539017381,
 45300228866,-99912799977]