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A152680 as a simple table

na(n)
14
212
316
428
536
640
752
860
972
1088
1196
12100
13108
14112
15136
16148
17156
18172
19180
20192
21196
22228
23232
24240
25256
26268
27276
28280
29292
30312
31316
32336
33348
34352
35372
36388
37396
38400
39408
40420
41432
42448
43456
44460
45508
46520
47540
48556
49568
50576
51592
52600
53612
54616

[4,12,16,28,36,40,52,60,72,88,96,100,108,112,136,
 148,156,172,180,192,196,228,232,240,256,268,276,
 280,292,312,316,336,348,352,372,388,396,400,408,
 420,432,448,456,460,508,520,540,556,568,576,592,
 600,612,616]