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A207360 as a simple table

na(n)
18
240
356
488
5104
6136
7152
8184
9232
10248
11280
12288
13296
14328
15344
16376
17424
18440
19472
20488
21520
22536
23568
24584
25616
26632
27664
28675
29680
30712
31728
32760
33776
34808
35824
36856
37872
38904
39920
40952
411016
421048
431064
441096
451112
461144
471160
481192
491208
501240
511256

[8,40,56,88,104,136,152,184,232,248,280,288,296,
 328,344,376,424,440,472,488,520,536,568,584,616,
 632,664,675,680,712,728,760,776,808,824,856,872,
 904,920,952,1016,1048,1064,1096,1112,1144,1160,
 1192,1208,1240,1256]