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A321580 as a simple table

na(n)
11
22
34
48
510
612
716
818
924
1026
1128
1232
1336
1440
1542
1652
1756
1858
1960
2064
2166
2280
2382
2496
2598
26100
27106
28108
29112
30120
31124
32128
33130
34136
35138
36144
37148
38156
39162
40168
41170
42172
43176
44178
45180
46184
47192
48196
49200
50204
51208
52210
53226
54228
55240
56242
57248
58250

[1,2,4,8,10,12,16,18,24,26,28,32,36,40,42,52,56,
 58,60,64,66,80,82,96,98,100,106,108,112,120,124,
 128,130,136,138,144,148,156,162,168,170,172,176,
 178,180,184,192,196,200,204,208,210,226,228,240,
 242,248,250]