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A258787 as a simple table

na(n)
15
28
317
47
526
6449
730
818
9197
10557
113
129
13118
141207
1519601
1622
17146
1819
19361
208201
21132857
2238
2340
24224
25249
264625
27296449
284486949
2954
3028
3168
3299
334033
344625
35296449
36126664001
3742
38130
3928
40118
41557
428201
43997757
4424800401
452363321449
4614
4741
48374
491745
50901
5146826
52217682
539312157
54758427193
555229752849

[5,8,17,7,26,449,30,18,197,557,3,9,118,1207,19601,
 22,146,19,361,8201,132857,38,40,224,249,4625,
 296449,4486949,54,28,68,99,4033,4625,296449,
 126664001,42,130,28,118,557,8201,997757,24800401,
 2363321449,14,41,374,1745,901,46826,217682,
 9312157,758427193,5229752849]