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A291855 as a simple table

na(n)
128
252
368
492
5124
6156
7172
8244
9260
10308
11327
12340
13348
14356
15380
16396
17404
18428
19436
20500
21508
22516
23532
24580
25612
26644
27660
28684
29696
30724
31732
32748
33764
34780
35796
36820
37836
38908
39940
40980
41996
421056
431076
441124
451172
461180

[28,52,68,92,124,156,172,244,260,308,327,340,348,
 356,380,396,404,428,436,500,508,516,532,580,612,
 644,660,684,696,724,732,748,764,780,796,820,836,
 908,940,980,996,1056,1076,1124,1172,1180]