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A087788 as a simple table

na(n)
1561
21105
31729
42465
52821
66601
78911
810585
915841
1029341
1146657
1252633
13115921
14162401
15252601
16294409
17314821
18334153
19399001
20410041
21488881
22512461
23530881
241024651
251152271
261193221
271461241
281615681
291857241
301909001
312508013

[561,1105,1729,2465,2821,6601,8911,10585,15841,
 29341,46657,52633,115921,162401,252601,294409,
 314821,334153,399001,410041,488881,512461,530881,
 1024651,1152271,1193221,1461241,1615681,1857241,
 1909001,2508013]