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A127257 as a simple table

na(n)
12
26
318
420
550
668
774
878
990
1096
11134
12138
13156
14200
15204
16228
17278
18288
19296
20306
21326
22338
23378
24384
25398
26404
27440
28464
29468
30504
31510
32524
33530
34546
35600
36608
37644
38660
39704
40726
41740
42774
43828
44854
45870
46930
47938
48944
49966
50986
511008
521034
531068

[2,6,18,20,50,68,74,78,90,96,134,138,156,200,204,
 228,278,288,296,306,326,338,378,384,398,404,440,
 464,468,504,510,524,530,546,600,608,644,660,704,
 726,740,774,828,854,870,930,938,944,966,986,1008,
 1034,1068]