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A248020 as a simple table

na(n)
121
235
339
450
555
657
763
865
975
1077
1185
1293
1398
14111
15115
16119
17129
18133
19143
20155
21161
22171
23175
24183
25185
26187
27189
28201
29203
30205
31209
32215
33217
34219
35221
36235
37237
38242
39245
40247
41253
42259
43265
44275
45279
46291
47299
48301
49305
50309
51319
52323
53325
54327
55329
56333
57335
58338
59341

[21,35,39,50,55,57,63,65,75,77,85,93,98,111,115,
 119,129,133,143,155,161,171,175,183,185,187,189,
 201,203,205,209,215,217,219,221,235,237,242,245,
 247,253,259,265,275,279,291,299,301,305,309,319,
 323,325,327,329,333,335,338,341]