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A189680 as a simple table

na(n)
12
26
310
412
516
620
722
826
930
1032
1136
1240
1344
1446
1550
1654
1756
1860
1964
2066
2170
2274
2376
2480
2584
2688
2790
2894
2998
30100
31104
32108
33110
34114
35118
36120
37124
38128
39132
40134
41138
42142
43144
44148
45152
46154
47158
48162
49166
50168
51172
52176
53178
54182
55186
56188
57192
58196
59198
60202
61206
62210
63212
64216
65220
66222
67226
68230
69232
70236
71240
72242
73246
74250

[2,6,10,12,16,20,22,26,30,32,36,40,44,46,50,54,56,
 60,64,66,70,74,76,80,84,88,90,94,98,100,104,108,
 110,114,118,120,124,128,132,134,138,142,144,148,
 152,154,158,162,166,168,172,176,178,182,186,188,
 192,196,198,202,206,210,212,216,220,222,226,230,
 232,236,240,242,246,250]