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A333019 as a simple table

na(n)
12
24
36
48
510
616
718
820
922
1028
1130
1240
1342
1444
1546
1652
1754
1856
1958
2064
2170
2278
2380
2482
25100
26102
27104
28106
29108
30110
31126
32128
33130
34136
35138
36148
37160
38162
39164
40166
41176
42178
43190
44196
45198
46208
47210
48220
49222
50224
51226
52238
53250
54260
55262
56268
57270
58280

[2,4,6,8,10,16,18,20,22,28,30,40,42,44,46,52,54,
 56,58,64,70,78,80,82,100,102,104,106,108,110,126,
 128,130,136,138,148,160,162,164,166,176,178,190,
 196,198,208,210,220,222,224,226,238,250,260,262,
 268,270,280]