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A176308 as a simple table

na(n)
16
242
366
478
5102
6114
7138
8186
9210
10222
11258
12282
13318
14330
15354
16366
17390
18402
19438
20462
21498
22510
23534
24546
25642
26678
27690
28714
29762
30786
31798
32858
33870
34894
35906
36942
37966
38978
391002
401038
411086
421110
431122
441218
451230
461254
471266
481290
491302
501338

[6,42,66,78,102,114,138,186,210,222,258,282,318,
 330,354,366,390,402,438,462,498,510,534,546,642,
 678,690,714,762,786,798,858,870,894,906,942,966,
 978,1002,1038,1086,1110,1122,1218,1230,1254,1266,
 1290,1302,1338]