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A271806 as a simple table

na(n)
03
11
227
3-27
491
5-79
6147
7-159
8331
9-311
10419
11-427
12627
13-583
14683
15-739
161195
17-1175
181411
19-1411
201699
21-1639
221819
23-1887
242499
25-2431
262651
27-2675
283115
29-2959
302979
31-3191
324459
33-4439
344931
35-4931
365475
37-5415
385851
39-5911
406739
41-6639
427019

[3,1,27,-27,91,-79,147,-159,331,-311,419,-427,627,
 -583,683,-739,1195,-1175,1411,-1411,1699,-1639,
 1819,-1887,2499,-2431,2651,-2675,3115,-2959,2979,
 -3191,4459,-4439,4931,-4931,5475,-5415,5851,-5911,
 6739,-6639,7019]