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A135731 as a simple table

na(n)
13
26
38
412
514
618
720
824
930
1032
1138
1242
1344
1448
1554
1660
1762
1868
1972
2074
2180
2284
2390
2498
25102
26104
27108
28110
29114
30128
31132
32138
33140
34150
35152
36158
37164
38168
39174
40180
41182
42192
43194
44198
45200
46212
47224
48228
49230
50234
51240
52242
53252
54258
55264
56270
57272
58278

[3,6,8,12,14,18,20,24,30,32,38,42,44,48,54,60,62,
 68,72,74,80,84,90,98,102,104,108,110,114,128,132,
 138,140,150,152,158,164,168,174,180,182,192,194,
 198,200,212,224,228,230,234,240,242,252,258,264,
 270,272,278]