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A273457 as a simple table

na(n)
12
24
36
48
512
618
720
822
924
1026
1130
1232
1338
1440
1544
1652
1756
1858
1962
2064
2170
2272
2376
2482
2584
2688
2792
2894
2998
30100
31102
32104
33106
34108
35110
36112
37114
38116
39118
40120
41122
42126
43128
44130
45132
46134
47136
48140
49144
50146
51152
52154
53156
54158
55164
56166
57172
58182
59188
60196
61198
62200
63214

[2,4,6,8,12,18,20,22,24,26,30,32,38,40,44,52,56,
 58,62,64,70,72,76,82,84,88,92,94,98,100,102,104,
 106,108,110,112,114,116,118,120,122,126,128,130,
 132,134,136,140,144,146,152,154,156,158,164,166,
 172,182,188,196,198,200,214]