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A115168 as a simple table

na(n)
18
210
312
424
536
638
758
860
968
1084
1186
12100
13102
14110
15112
16120
17134
18138
19144
20154
21172
22178
23184
24188
25204
26216
27230
28240
29244
30276
31284
32288
33300
34302
35320
36342
37346
38360
39368
40372
41374
42378
43384
44394
45396
46404
47408
48428
49432
50436
51440
52456
53466
54472

[8,10,12,24,36,38,58,60,68,84,86,100,102,110,112,
 120,134,138,144,154,172,178,184,188,204,216,230,
 240,244,276,284,288,300,302,320,342,346,360,368,
 372,374,378,384,394,396,404,408,428,432,436,440,
 456,466,472]