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A067315 as a simple table

na(n)
14
26
38
410
514
616
718
820
922
1024
1126
1228
1332
1434
1536
1638
1740
1842
1944
2046
2148
2250
2352
2454
2558
2660
2762
2864
2966
3068
3170
3272
3374
3476
3578
3680
3782
3886
3988
4092
4194
4296
4398
44100
45102
46104
47106
48108
49110
50112
51114
52116
53118
54120
55122
56124
57126
58128
59130
60134
61136
62138
63140

[4,6,8,10,14,16,18,20,22,24,26,28,32,34,36,38,40,
 42,44,46,48,50,52,54,58,60,62,64,66,68,70,72,74,
 76,78,80,82,86,88,92,94,96,98,100,102,104,106,108,
 110,112,114,116,118,120,122,124,126,128,130,134,
 136,138,140]