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A174786 as a simple table

na(n)
13
29
315
421
539
645
751
881
999
10105
11129
12165
13171
14189
15225
16231
17249
18255
19261
20309
21345
22351
23381
24441
25459
26501
27555
28561
29585
30591
31639
32645
33651
34675
35819
36855
37879
38939
39945
40969
41975
421011
431089
441095
451101
461179
471185
481215
491221
501275
511281
521299
531359
541365

[3,9,15,21,39,45,51,81,99,105,129,165,171,189,225,
 231,249,255,261,309,345,351,381,441,459,501,555,
 561,585,591,639,645,651,675,819,855,879,939,945,
 969,975,1011,1089,1095,1101,1179,1185,1215,1221,
 1275,1281,1299,1359,1365]