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A068306 as a simple table

na(n)
14
28
312
416
518
620
724
827
932
1036
1140
1248
1354
1456
1564
1672
1780
1881
1988
2096
21104
22108
23112
24128
25144
26160
27162
28176
29192
30208
31216
32224
33243
34256
35272
36288
37304
38320
39324
40352
41368
42384
43416
44432
45448
46464
47486
48512
49544
50576
51608
52640
53704
54729
55736
56768
57832

[4,8,12,16,18,20,24,27,32,36,40,48,54,56,64,72,80,
 81,88,96,104,108,112,128,144,160,162,176,192,208,
 216,224,243,256,272,288,304,320,324,352,368,384,
 416,432,448,464,486,512,544,576,608,640,704,729,
 736,768,832]