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A058492 as a simple table

na(n)
01
1-3
23
3-7
418
5-21
630
7-57
875
9-104
10156
11-207
12293
13-411
14525
15-712
16984
17-1248
181622
19-2169
202757
21-3530
224560
23-5736
247284
25-9249
2611472
27-14374
2818078
29-22242
3027484
31-34140
3241787
33-51184
3462796
35-76317
3692893
37-112998
38136275
39-164671
40199014

[1,-3,3,-7,18,-21,30,-57,75,-104,156,-207,293,
 -411,525,-712,984,-1248,1622,-2169,2757,-3530,
 4560,-5736,7284,-9249,11472,-14374,18078,-22242,
 27484,-34140,41787,-51184,62796,-76317,92893,
 -112998,136275,-164671,199014]