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A068354 as a simple table

na(n)
14
26
38
410
512
616
718
820
924
1028
1130
1232
1336
1440
1542
1644
1745
1848
1950
2052
2154
2256
2360
2464
2566
2670
2772
2878
2980
3084
3188
3290
3396
34100
35102
36104
37105
38108
39110
40112
41114
42120
43126
44128
45130
46132
47135
48136
49138
50140
51144
52150
53152
54154
55156
56160
57162
58165
59168
60170

[4,6,8,10,12,16,18,20,24,28,30,32,36,40,42,44,45,
 48,50,52,54,56,60,64,66,70,72,78,80,84,88,90,96,
 100,102,104,105,108,110,112,114,120,126,128,130,
 132,135,136,138,140,144,150,152,154,156,160,162,
 165,168,170]