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A138639 as a simple table

na(n)
12
26
38
412
520
630
732
836
942
1048
1156
1268
1372
1478
1590
1692
1796
1898
19110
20116
21126
22138
23140
24152
25156
26158
27168
28170
29176
30182
31186
32188
33198
34210
35212
36222
37236
38242
39246
40252
41272
42278
43288
44296
45302
46306
47308
48312
49320
50330
51338
52356
53368
54380
55386
56396

[2,6,8,12,20,30,32,36,42,48,56,68,72,78,90,92,96,
 98,110,116,126,138,140,152,156,158,168,170,176,
 182,186,188,198,210,212,222,236,242,246,252,272,
 278,288,296,302,306,308,312,320,330,338,356,368,
 380,386,396]