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A231086 as a simple table

na(n)
118
240
354
470
578
688
7100
8102
9112
10138
11160
12174
13196
14198
15208
16220
17222
18258
19270
20280
21304
22306
23318
24340
25348
26350
27352
28364
29366
30378
31390
32400
33414
34438
35448
36460
37462
38474
39490
40498
41520
42532
43544
44550
45558
46570
47580
48606
49616
50618
51640
52642
53648

[18,40,54,70,78,88,100,102,112,138,160,174,196,
 198,208,220,222,258,270,280,304,306,318,340,348,
 350,352,364,366,378,390,400,414,438,448,460,462,
 474,490,498,520,532,544,550,558,570,580,606,616,
 618,640,642,648]