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A016921 as a simple table

na(n)
01
17
213
319
425
531
637
743
849
955
1061
1167
1273
1379
1485
1591
1697
17103
18109
19115
20121
21127
22133
23139
24145
25151
26157
27163
28169
29175
30181
31187
32193
33199
34205
35211
36217
37223
38229
39235
40241
41247
42253
43259
44265
45271
46277
47283
48289
49295
50301
51307
52313
53319
54325
55331

[1,7,13,19,25,31,37,43,49,55,61,67,73,79,85,91,97,
 103,109,115,121,127,133,139,145,151,157,163,169,
 175,181,187,193,199,205,211,217,223,229,235,241,
 247,253,259,265,271,277,283,289,295,301,307,313,
 319,325,331]